77380072 has 32 divisors (see below), whose sum is σ = 180889920. Its totient is φ = 30147840.

The previous prime is 77380063. The next prime is 77380087. The reversal of 77380072 is 27008377.

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, 62193 + ... + 63424.

It is an arithmetic number, because the mean of its divisors is an integer number (5652810).

Almost surely, 2^77380072 is an apocalyptic number.

It is an amenable number.

77380072 is an abundant number, since it is smaller than the sum of its proper divisors (103509848).

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

77380072 is a wasteful number, since it uses less digits than its factorization.

77380072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125641 (or 125637 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 77380072 is about 8796.5943409936. The cubic root of 77380072 is about 426.1309155559.

The spelling of 77380072 in words is "seventy-seven million, three hundred eighty thousand, seventy-two".