77886940 has 12 divisors (see below), whose sum is σ = 163562616. Its totient is φ = 31154768.

The previous prime is 77886937. The next prime is 77886989. The reversal of 77886940 is 4968877.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1947154 + ... + 1947193.

It is an arithmetic number, because the mean of its divisors is an integer number (13630218).

Almost surely, 2^77886940 is an apocalyptic number.

It is an amenable number.

77886940 is an abundant number, since it is smaller than the sum of its proper divisors (85675676).

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

77886940 is a wasteful number, since it uses less digits than its factorization.

77886940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894356 (or 3894354 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 77886940 is about 8825.3577831157. The cubic root of 77886940 is about 427.0593295465.

The spelling of 77886940 in words is "seventy-seven million, eight hundred eighty-six thousand, nine hundred forty".