64831980 has 48 divisors (see below), whose sum is σ = 182103264. Its totient is φ = 17233920.

The previous prime is 64831979. The next prime is 64832041. The reversal of 64831980 is 8913846.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19650 + ... + 22710.

It is an arithmetic number, because the mean of its divisors is an integer number (3793818).

Almost surely, 2^64831980 is an apocalyptic number.

64831980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64831980 is an abundant number, since it is smaller than the sum of its proper divisors (117271284).

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

64831980 is a wasteful number, since it uses less digits than its factorization.

64831980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426 (or 3424 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 64831980 is about 8051.8308477017. The cubic root of 64831980 is about 401.7258346940.

The spelling of 64831980 in words is "sixty-four million, eight hundred thirty-one thousand, nine hundred eighty".