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40655399 = 53671072
BaseRepresentation
bin1001101100010…
…1101000100111
32211111111201112
42123011220213
540401433044
64011215235
71002364601
oct233055047
984444645
1040655399
1120a49004
121174751b
138565c65
145584171
15388109e
hex26c5a27

40655399 has 12 divisors (see below), whose sum is σ = 42437304. Its totient is φ = 38925744.

The previous prime is 40655387. The next prime is 40655413. The reversal of 40655399 is 99355604.

40655399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2k-40655399 is a prime.

It is a super-2 number, since 2×406553992 = 3305722935698402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40655369) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 379904 + ... + 380010.

It is an arithmetic number, because the mean of its divisors is an integer number (3536442).

Almost surely, 240655399 is an apocalyptic number.

40655399 is a deficient number, since it is larger than the sum of its proper divisors (1781905).

40655399 is an equidigital number, since it uses as much as digits as its factorization.

40655399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 40655399 is about 6376.1586398081. The cubic root of 40655399 is about 343.8529404538.

The spelling of 40655399 in words is "forty million, six hundred fifty-five thousand, three hundred ninety-nine".