67864656 has 40 divisors (see below), whose sum is σ = 184546720. Its totient is φ = 21430656.

The previous prime is 67864631. The next prime is 67864661. The reversal of 67864656 is 65646876.

It is a super-2 number, since 2×67864656² = 9211223067996672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36295 + ... + 38118.

It is an arithmetic number, because the mean of its divisors is an integer number (4613668).

Almost surely, 2^67864656 is an apocalyptic number.

It is an amenable number.

67864656 is an abundant number, since it is smaller than the sum of its proper divisors (116682064).

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

67864656 is a wasteful number, since it uses less digits than its factorization.

67864656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74443 (or 74437 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The square root of 67864656 is about 8238.0007283321. Note that the first 3 decimals coincide. The cubic root of 67864656 is about 407.8945325238.

The spelling of 67864656 in words is "sixty-seven million, eight hundred sixty-four thousand, six hundred fifty-six".