77081892 has 24 divisors (see below), whose sum is σ = 182544096. Its totient is φ = 25310208.

The previous prime is 77081831. The next prime is 77081897. The reversal of 77081892 is 29818077.

It is not an unprimeable number, because it can be changed into a prime (77081897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47133 + ... + 48740.

It is an arithmetic number, because the mean of its divisors is an integer number (7606004).

Almost surely, 2^77081892 is an apocalyptic number.

It is an amenable number.

77081892 is an abundant number, since it is smaller than the sum of its proper divisors (105462204).

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

77081892 is a wasteful number, since it uses less digits than its factorization.

77081892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95947 (or 95945 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 77081892 is about 8779.6293771434. The cubic root of 77081892 is about 425.5828533546.

The spelling of 77081892 in words is "seventy-seven million, eighty-one thousand, eight hundred ninety-two".