64728132 has 24 divisors (see below), whose sum is σ = 172608576. Its totient is φ = 18493728.

The previous prime is 64728107. The next prime is 64728143. The reversal of 64728132 is 23182746.

It is a junction number, because it is equal to n+sod(n) for n = 64728093 and 64728102.

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, 385203 + ... + 385370.

It is an arithmetic number, because the mean of its divisors is an integer number (7192024).

Almost surely, 2^64728132 is an apocalyptic number.

It is an amenable number.

64728132 is an abundant number, since it is smaller than the sum of its proper divisors (107880444).

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

64728132 is a wasteful number, since it uses less digits than its factorization.

64728132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770587 (or 770585 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 64728132 is about 8045.3795435641. The cubic root of 64728132 is about 401.5112249741.

The spelling of 64728132 in words is "sixty-four million, seven hundred twenty-eight thousand, one hundred thirty-two".