77130448 has 10 divisors (see below), whose sum is σ = 149440274. Its totient is φ = 38565216.

The previous prime is 77130439. The next prime is 77130451. The reversal of 77130448 is 84403177.

It can be written as a sum of positive squares in only one way, i.e., 45859984 + 31270464 = 6772^2 + 5592^2 .

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, 2410311 + ... + 2410342.

Almost surely, 2^77130448 is an apocalyptic number.

It is an amenable number.

77130448 is a deficient number, since it is larger than the sum of its proper divisors (72309826).

77130448 is a wasteful number, since it uses less digits than its factorization.

77130448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820661 (or 4820655 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 77130448 is about 8782.3942065931. The cubic root of 77130448 is about 425.6721967050.

The spelling of 77130448 in words is "seventy-seven million, one hundred thirty thousand, four hundred forty-eight".