77072272 has 10 divisors (see below), whose sum is σ = 149327558. Its totient is φ = 38536128.

The previous prime is 77072269. The next prime is 77072323. The reversal of 77072272 is 27227077.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 70291456 + 6780816 = 8384^2 + 2604^2 .

It is a super-2 number, since 2×77072272² = 11880270222483968, 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, 2408493 + ... + 2408524.

Almost surely, 2^77072272 is an apocalyptic number.

It is an amenable number.

77072272 is a deficient number, since it is larger than the sum of its proper divisors (72255286).

77072272 is a wasteful number, since it uses less digits than its factorization.

77072272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4817025 (or 4817019 counting only the distinct ones).

The product of its (nonzero) digits is 19208, while the sum is 34.

The square root of 77072272 is about 8779.0815009316. The cubic root of 77072272 is about 425.5651480402.

The spelling of 77072272 in words is "seventy-seven million, seventy-two thousand, two hundred seventy-two".