77275172 has 24 divisors (see below), whose sum is σ = 147636216. Its totient is φ = 35175168.

The previous prime is 77275151. The next prime is 77275259. The reversal of 77275172 is 27157277.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5635876 + 71639296 = 2374^2 + 8464^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6383 + ... + 13974.

It is an arithmetic number, because the mean of its divisors is an integer number (6151509).

Almost surely, 2^77275172 is an apocalyptic number.

It is an amenable number.

77275172 is a deficient number, since it is larger than the sum of its proper divisors (70361044).

77275172 is a wasteful number, since it uses less digits than its factorization.

77275172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20447 (or 20445 counting only the distinct ones).

The product of its digits is 48020, while the sum is 38.

The square root of 77275172 is about 8790.6297840371. The cubic root of 77275172 is about 425.9382675577.

The spelling of 77275172 in words is "seventy-seven million, two hundred seventy-five thousand, one hundred seventy-two".