67921968 has 40 divisors (see below), whose sum is σ = 176602288. Its totient is φ = 22493952.

The previous prime is 67921963. The next prime is 67921999. The reversal of 67921968 is 86912976.

It is a super-2 number, since 2×67921968² = 9226787473986048, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (67921963) 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, 3030 + ... + 12042.

Almost surely, 2^67921968 is an apocalyptic number.

It is an amenable number.

67921968 is an abundant number, since it is smaller than the sum of its proper divisors (108680320).

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

67921968 is a wasteful number, since it uses less digits than its factorization.

67921968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9181 (or 9175 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 67921968 is about 8241.4785081319. The cubic root of 67921968 is about 408.0093231241.

The spelling of 67921968 in words is "sixty-seven million, nine hundred twenty-one thousand, nine hundred sixty-eight".