64728136 has 32 divisors (see below), whose sum is σ = 139370400. Its totient is φ = 27872640.

The previous prime is 64728107. The next prime is 64728143. The reversal of 64728136 is 63182746.

It is a junction number, because it is equal to n+sod(n) for n = 64728095 and 64728104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17685 + ... + 21028.

It is an arithmetic number, because the mean of its divisors is an integer number (4355325).

Almost surely, 2^64728136 is an apocalyptic number.

It is an amenable number.

64728136 is an abundant number, since it is smaller than the sum of its proper divisors (74642264).

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

64728136 is a wasteful number, since it uses less digits than its factorization.

64728136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38749 (or 38745 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 64728136 is about 8045.3797921540. The cubic root of 64728136 is about 401.5112332448.

The spelling of 64728136 in words is "sixty-four million, seven hundred twenty-eight thousand, one hundred thirty-six".