64140936 has 32 divisors (see below), whose sum is σ = 161857440. Its totient is φ = 21179648.

The previous prime is 64140931. The next prime is 64141003. The reversal of 64140936 is 63904146.

64140936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64140936² = 8228119341912192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64140897 and 64140906.

It is not an unprimeable number, because it can be changed into a prime (64140931) 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 7 ways as a sum of consecutive naturals, for example, 9921 + ... + 15056.

It is an arithmetic number, because the mean of its divisors is an integer number (5058045).

Almost surely, 2^64140936 is an apocalyptic number.

It is an amenable number.

64140936 is an abundant number, since it is smaller than the sum of its proper divisors (97716504).

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

64140936 is a wasteful number, since it uses less digits than its factorization.

64140936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25093 (or 25089 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 64140936 is about 8008.8036559776. The cubic root of 64140936 is about 400.2934014031.

The spelling of 64140936 in words is "sixty-four million, one hundred forty thousand, nine hundred thirty-six".