64245540 has 96 divisors (see below), whose sum is σ = 186157440. Its totient is φ = 16546816.

The previous prime is 64245523. The next prime is 64245551. The reversal of 64245540 is 4554246.

64245540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 64245498 and 64245507.

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 31 ways as a sum of consecutive naturals, for example, 282907 + ... + 283133.

It is an arithmetic number, because the mean of its divisors is an integer number (1939140).

Almost surely, 2^64245540 is an apocalyptic number.

64245540 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 64245540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93078720).

64245540 is an abundant number, since it is smaller than the sum of its proper divisors (121911900).

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

64245540 is a wasteful number, since it uses less digits than its factorization.

64245540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 64245540 is about 8015.3315589562. The cubic root of 64245540 is about 400.5108888703.

Adding to 64245540 its reverse (4554246), we get a palindrome (68799786).

The spelling of 64245540 in words is "sixty-four million, two hundred forty-five thousand, five hundred forty".