67944864 has 48 divisors (see below), whose sum is σ = 192078432. Its totient is φ = 20905728.

The previous prime is 67944847. The next prime is 67944871. The reversal of 67944864 is 46844976.

It is a tau number, because it is divible by the number of its divisors (48).

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

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, 25974 + ... + 28469.

It is an arithmetic number, because the mean of its divisors is an integer number (4001634).

Almost surely, 2^67944864 is an apocalyptic number.

It is an amenable number.

67944864 is an abundant number, since it is smaller than the sum of its proper divisors (124133568).

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

67944864 is a wasteful number, since it uses less digits than its factorization.

67944864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54469 (or 54461 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 67944864 is about 8242.8674622367. The cubic root of 67944864 is about 408.0551636293.

The spelling of 67944864 in words is "sixty-seven million, nine hundred forty-four thousand, eight hundred sixty-four".