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64940040 = 233251123231
BaseRepresentation
bin1111011110111…
…0100000001000
311112012021222200
43313232200020
5113111040130
610235520200
71415660364
oct367564010
9145167880
1064940040
1133725460
12198b9060
13105b9679
1488a62a4
155a7b760
hex3dee808

64940040 has 288 divisors, whose sum is σ = 248451840. Its totient is φ = 14572800.

The previous prime is 64940039. The next prime is 64940059. The reversal of 64940040 is 4004946.

64940040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64939986 and 64940013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2094825 + ... + 2094855.

It is an arithmetic number, because the mean of its divisors is an integer number (862680).

Almost surely, 264940040 is an apocalyptic number.

64940040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64940040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124225920).

64940040 is an abundant number, since it is smaller than the sum of its proper divisors (183511800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64940040 is a wasteful number, since it uses less digits than its factorization.

64940040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 64940040 is about 8058.5383290024. The cubic root of 64940040 is about 401.9489056618.

Adding to 64940040 its reverse (4004946), we get a palindrome (68944986).

The spelling of 64940040 in words is "sixty-four million, nine hundred forty thousand, forty".