67922728 has 8 divisors (see below), whose sum is σ = 127355130. Its totient is φ = 33961360.

The previous prime is 67922719. The next prime is 67922759. The reversal of 67922728 is 82722976.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48191364 + 19731364 = 6942^2 + 4442^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×67922728² = 9226993957923968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245163 + ... + 4245178.

Almost surely, 2^67922728 is an apocalyptic number.

It is an amenable number.

67922728 is a deficient number, since it is larger than the sum of its proper divisors (59432402).

67922728 is a wasteful number, since it uses less digits than its factorization.

67922728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8490347 (or 8490343 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 67922728 is about 8241.5246162345. The cubic root of 67922728 is about 408.0108448995.

The spelling of 67922728 in words is "sixty-seven million, nine hundred twenty-two thousand, seven hundred twenty-eight".