77397272 has 8 divisors (see below), whose sum is σ = 145119900. Its totient is φ = 38698632.

The previous prime is 77397263. The next prime is 77397293. The reversal of 77397272 is 27279377.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4837322 + ... + 4837337.

Almost surely, 2^77397272 is an apocalyptic number.

77397272 is the 4703-rd centered heptagonal number.

It is an amenable number.

77397272 is a deficient number, since it is larger than the sum of its proper divisors (67722628).

77397272 is a wasteful number, since it uses less digits than its factorization.

77397272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9674665 (or 9674661 counting only the distinct ones).

The product of its digits is 259308, while the sum is 44.

The square root of 77397272 is about 8797.5719377565. The cubic root of 77397272 is about 426.1624865989.

The spelling of 77397272 in words is "seventy-seven million, three hundred ninety-seven thousand, two hundred seventy-two".