64508928 has 176 divisors, whose sum is σ = 198084096. Its totient is φ = 18472960.

The previous prime is 64508911. The next prime is 64508929. The reversal of 64508928 is 82980546.

It is a tau number, because it is divible by the number of its divisors (176).

It is a super-2 number, since 2×64508928² = 8322803583418368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64508928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64508929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 777175 + ... + 777257.

Almost surely, 2^64508928 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 64508928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99042048).

64508928 is an abundant number, since it is smaller than the sum of its proper divisors (133575168).

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

64508928 is a wasteful number, since it uses less digits than its factorization.

64508928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 64508928 is about 8031.7450158730. The cubic root of 64508928 is about 401.0574686035.

The spelling of 64508928 in words is "sixty-four million, five hundred eight thousand, nine hundred twenty-eight".