64988928 has 108 divisors (see below), whose sum is σ = 190627528. Its totient is φ = 21288960.

The previous prime is 64988897. The next prime is 64988939. The reversal of 64988928 is 82988946.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154158 + ... + 154578.

Almost surely, 2^64988928 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 64988928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95313764).

64988928 is an abundant number, since it is smaller than the sum of its proper divisors (125638600).

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

64988928 is a wasteful number, since it uses less digits than its factorization.

64988928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 493 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 64988928 is about 8061.5710627644. The cubic root of 64988928 is about 402.0497450879.

The spelling of 64988928 in words is "sixty-four million, nine hundred eighty-eight thousand, nine hundred twenty-eight".