64256736 has 48 divisors (see below), whose sum is σ = 178600464. Its totient is φ = 20158464.

The previous prime is 64256711. The next prime is 64256737. The reversal of 64256736 is 63765246.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 64256694 and 64256703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64256737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18055 + ... + 21318.

It is an arithmetic number, because the mean of its divisors is an integer number (3720843).

Almost surely, 2^64256736 is an apocalyptic number.

It is an amenable number.

64256736 is an abundant number, since it is smaller than the sum of its proper divisors (114343728).

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

64256736 is a wasteful number, since it uses less digits than its factorization.

64256736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39403 (or 39395 counting only the distinct ones).

The product of its digits is 181440, while the sum is 39.

The square root of 64256736 is about 8016.0299400638. The cubic root of 64256736 is about 400.5341530505.

The spelling of 64256736 in words is "sixty-four million, two hundred fifty-six thousand, seven hundred thirty-six".