64249868 has 36 divisors (see below), whose sum is σ = 125881560. Its totient is φ = 28515456.

The previous prime is 64249847. The next prime is 64249891. The reversal of 64249868 is 86894246.

It is a congruent number.

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, 288005 + ... + 288227.

It is an arithmetic number, because the mean of its divisors is an integer number (3496710).

Almost surely, 2^64249868 is an apocalyptic number.

64249868 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

64249868 is a deficient number, since it is larger than the sum of its proper divisors (61631692).

64249868 is a wasteful number, since it uses less digits than its factorization.

64249868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 261 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 64249868 is about 8015.6015370027. The cubic root of 64249868 is about 400.5198823465.

The spelling of 64249868 in words is "sixty-four million, two hundred forty-nine thousand, eight hundred sixty-eight".