64233980 has 24 divisors (see below), whose sum is σ = 136231200. Its totient is φ = 25438400.

The previous prime is 64233979. The next prime is 64233989. The reversal of 64233980 is 8933246.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64233980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64233989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13880 + ... + 17919.

It is an arithmetic number, because the mean of its divisors is an integer number (5676300).

Almost surely, 2^64233980 is an apocalyptic number.

It is an amenable number.

64233980 is an abundant number, since it is smaller than the sum of its proper divisors (71997220).

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

64233980 is a wasteful number, since it uses less digits than its factorization.

64233980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31909 (or 31907 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 64233980 is about 8014.6104084977. The cubic root of 64233980 is about 400.4868654979.

The spelling of 64233980 in words is "sixty-four million, two hundred thirty-three thousand, nine hundred eighty".