64291980 has 24 divisors (see below), whose sum is σ = 180017712. Its totient is φ = 17144512.

The previous prime is 64291949. The next prime is 64292027. The reversal of 64291980 is 8919246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535707 + ... + 535826.

It is an arithmetic number, because the mean of its divisors is an integer number (7500738).

Almost surely, 2^64291980 is an apocalyptic number.

64291980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64291980 is an abundant number, since it is smaller than the sum of its proper divisors (115725732).

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

64291980 is a wasteful number, since it uses less digits than its factorization.

64291980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071545 (or 1071543 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 64291980 is about 8018.2279837879. The cubic root of 64291980 is about 400.6073689573.

The spelling of 64291980 in words is "sixty-four million, two hundred ninety-one thousand, nine hundred eighty".