64121928 has 32 divisors (see below), whose sum is σ = 172636800. Its totient is φ = 19729728.

The previous prime is 64121879. The next prime is 64121957. The reversal of 64121928 is 82912146.

It is a super-2 number, since 2×64121928² = 8223243300874368, which contains 22 as substring.

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, 102448 + ... + 103071.

It is an arithmetic number, because the mean of its divisors is an integer number (5394900).

Almost surely, 2^64121928 is an apocalyptic number.

It is an amenable number.

64121928 is an abundant number, since it is smaller than the sum of its proper divisors (108514872).

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

64121928 is a wasteful number, since it uses less digits than its factorization.

64121928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205541 (or 205537 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 64121928 is about 8007.6168739520. The cubic root of 64121928 is about 400.2538555260.

The spelling of 64121928 in words is "sixty-four million, one hundred twenty-one thousand, nine hundred twenty-eight".