64279400 has 24 divisors (see below), whose sum is σ = 149450070. Its totient is φ = 25711680.

The previous prime is 64279393. The next prime is 64279403. The reversal of 64279400 is 497246.

It can be written as a sum of positive squares in 3 ways, for example, as 36168196 + 28111204 = 6014^2 + 5302^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64279403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160499 + ... + 160898.

Almost surely, 2^64279400 is an apocalyptic number.

It is an amenable number.

64279400 is an abundant number, since it is smaller than the sum of its proper divisors (85170670).

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

64279400 is a wasteful number, since it uses less digits than its factorization.

64279400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321413 (or 321404 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 64279400 is about 8017.4434828067. The cubic root of 64279400 is about 400.5812383293.

The spelling of 64279400 in words is "sixty-four million, two hundred seventy-nine thousand, four hundred".