67998864 has 40 divisors (see below), whose sum is σ = 176026432. Its totient is φ = 22619520.

The previous prime is 67998863. The next prime is 67998907. The reversal of 67998864 is 46889976.

It is not an unprimeable number, because it can be changed into a prime (67998863) 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, 28269 + ... + 30579.

Almost surely, 2^67998864 is an apocalyptic number.

It is an amenable number.

67998864 is an abundant number, since it is smaller than the sum of its proper divisors (108027568).

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

67998864 is a wasteful number, since it uses less digits than its factorization.

67998864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2935 (or 2929 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 57.

The square root of 67998864 is about 8246.1423708301. The cubic root of 67998864 is about 408.1632372574.

The spelling of 67998864 in words is "sixty-seven million, nine hundred ninety-eight thousand, eight hundred sixty-four".