64190976 has 120 divisors (see below), whose sum is σ = 181030080. Its totient is φ = 20207616.

The previous prime is 64190947. The next prime is 64190989. The reversal of 64190976 is 67909146.

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, 812505 + ... + 812583.

It is an arithmetic number, because the mean of its divisors is an integer number (1508584).

Almost surely, 2^64190976 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 64190976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90515040).

64190976 is an abundant number, since it is smaller than the sum of its proper divisors (116839104).

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

64190976 is an equidigital number, since it uses as much as digits as its factorization.

64190976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 64190976 is about 8011.9271090044. The cubic root of 64190976 is about 400.3974715767.

The spelling of 64190976 in words is "sixty-four million, one hundred ninety thousand, nine hundred seventy-six".