64133868 has 24 divisors (see below), whose sum is σ = 150515568. Its totient is φ = 21253696.

The previous prime is 64133863. The next prime is 64133879. The reversal of 64133868 is 86833146.

It is a super-2 number, since 2×64133868² = 8226306049282848, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) 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 (64133863) 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, 13371 + ... + 17522.

It is an arithmetic number, because the mean of its divisors is an integer number (6271482).

Almost surely, 2^64133868 is an apocalyptic number.

It is an amenable number.

64133868 is an abundant number, since it is smaller than the sum of its proper divisors (86381700).

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

64133868 is a wasteful number, since it uses less digits than its factorization.

64133868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31073 (or 31071 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 64133868 is about 8008.3623794132. The cubic root of 64133868 is about 400.2786974409.

The spelling of 64133868 in words is "sixty-four million, one hundred thirty-three thousand, eight hundred sixty-eight".