64291400 has 48 divisors (see below), whose sum is σ = 150007140. Its totient is φ = 25625600.

The previous prime is 64291393. The next prime is 64291439. The reversal of 64291400 is 419246.

It can be written as a sum of positive squares in 6 ways, for example, as 3232804 + 61058596 = 1798^2 + 7814^2 .

It is a super-2 number, since 2×64291400² = 8266768227920000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64291400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103892 + ... + 104508.

Almost surely, 2^64291400 is an apocalyptic number.

It is an amenable number.

64291400 is an abundant number, since it is smaller than the sum of its proper divisors (85715740).

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

64291400 is a wasteful number, since it uses less digits than its factorization.

64291400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 64291400 is about 8018.1918161142. The cubic root of 64291400 is about 400.6061642815.

The spelling of 64291400 in words is "sixty-four million, two hundred ninety-one thousand, four hundred".