77121296 has 30 divisors (see below), whose sum is σ = 173819790. Its totient is φ = 33051648.

The previous prime is 77121271. The next prime is 77121311. The reversal of 77121296 is 69212177.

It can be written as a sum of positive squares in only one way, i.e., 76807696 + 313600 = 8764^2 + 560^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48401 + ... + 49968.

It is an arithmetic number, because the mean of its divisors is an integer number (5793993).

Almost surely, 2^77121296 is an apocalyptic number.

It is an amenable number.

77121296 is an abundant number, since it is smaller than the sum of its proper divisors (96698494).

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

77121296 is a wasteful number, since it uses less digits than its factorization.

77121296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98391 (or 98378 counting only the distinct ones).

The product of its digits is 10584, while the sum is 35.

The square root of 77121296 is about 8781.8731487081. The cubic root of 77121296 is about 425.6553598348.

The spelling of 77121296 in words is "seventy-seven million, one hundred twenty-one thousand, two hundred ninety-six".