64705872 has 240 divisors, whose sum is σ = 220860864. Its totient is φ = 16128000.

The previous prime is 64705843. The next prime is 64705919. The reversal of 64705872 is 27850746.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64705872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1060722 + ... + 1060782.

Almost surely, 2^64705872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64705872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110430432).

64705872 is an abundant number, since it is smaller than the sum of its proper divisors (156154992).

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

64705872 is a wasteful number, since it uses less digits than its factorization.

64705872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 64705872 is about 8043.9960218787. The cubic root of 64705872 is about 401.4651931363.

The spelling of 64705872 in words is "sixty-four million, seven hundred five thousand, eight hundred seventy-two".