77240272 has 20 divisors (see below), whose sum is σ = 150012100. Its totient is φ = 38527488.

The previous prime is 77240249. The next prime is 77240297. The reversal of 77240272 is 27204277.

It can be written as a sum of positive squares in 2 ways, for example, as 15397776 + 61842496 = 3924^2 + 7864^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1354 + ... + 12502.

It is an arithmetic number, because the mean of its divisors is an integer number (7500605).

Almost surely, 2^77240272 is an apocalyptic number.

It is an amenable number.

77240272 is a deficient number, since it is larger than the sum of its proper divisors (72771828).

77240272 is a wasteful number, since it uses less digits than its factorization.

77240272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11590 (or 11584 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 31.

The square root of 77240272 is about 8788.6444916153. The cubic root of 77240272 is about 425.8741353421.

The spelling of 77240272 in words is "seventy-seven million, two hundred forty thousand, two hundred seventy-two".