64488400 has 30 divisors (see below), whose sum is σ = 154934342. Its totient is φ = 25795200.

The previous prime is 64488379. The next prime is 64488409. The reversal of 64488400 is 488446.

It can be written as a sum of positive squares in 3 ways, for example, as 7817616 + 56670784 = 2796^2 + 7528^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64488409) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 80211 + ... + 81010.

Almost surely, 2^64488400 is an apocalyptic number.

It is an amenable number.

64488400 is an abundant number, since it is smaller than the sum of its proper divisors (90445942).

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

64488400 is a wasteful number, since it uses less digits than its factorization.

64488400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161239 (or 161228 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 64488400 is about 8030.4669851759. The cubic root of 64488400 is about 401.0149226520.

The spelling of 64488400 in words is "sixty-four million, four hundred eighty-eight thousand, four hundred".