64728937 has 8 divisors (see below), whose sum is σ = 79666496. Its totient is φ = 51214032.

The previous prime is 64728931. The next prime is 64728941. The reversal of 64728937 is 73982746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64728937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64728931) 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, 355563 + ... + 355744.

It is an arithmetic number, because the mean of its divisors is an integer number (9958312).

Almost surely, 2^64728937 is an apocalyptic number.

It is an amenable number.

64728937 is a deficient number, since it is larger than the sum of its proper divisors (14937559).

64728937 is a wasteful number, since it uses less digits than its factorization.

64728937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711327.

The product of its digits is 508032, while the sum is 46.

The square root of 64728937 is about 8045.4295721235. The cubic root of 64728937 is about 401.5128894497.

It can be divided in two parts, 647 and 28937, that added together give a square (29584 = 172²).

The spelling of 64728937 in words is "sixty-four million, seven hundred twenty-eight thousand, nine hundred thirty-seven".