77055140 has 24 divisors (see below), whose sum is σ = 165580800. Its totient is φ = 30104928.

The previous prime is 77055133. The next prime is 77055193. The reversal of 77055140 is 4155077.

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, 43940 + ... + 45659.

It is an arithmetic number, because the mean of its divisors is an integer number (6899200).

Almost surely, 2^77055140 is an apocalyptic number.

It is an amenable number.

77055140 is an abundant number, since it is smaller than the sum of its proper divisors (88525660).

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

77055140 is a wasteful number, since it uses less digits than its factorization.

77055140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89651 (or 89649 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 77055140 is about 8778.1057182060. The cubic root of 77055140 is about 425.5336134723.

The spelling of 77055140 in words is "seventy-seven million, fifty-five thousand, one hundred forty".