77880984 has 16 divisors (see below), whose sum is σ = 194702520. Its totient is φ = 25960320.

The previous prime is 77880977. The next prime is 77880991. The reversal of 77880984 is 48908877.

It is an interprime number because it is at equal distance from previous prime (77880977) and next prime (77880991).

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, 1622497 + ... + 1622544.

Almost surely, 2^77880984 is an apocalyptic number.

It is an amenable number.

77880984 is an abundant number, since it is smaller than the sum of its proper divisors (116821536).

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

77880984 is a wasteful number, since it uses less digits than its factorization.

77880984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245050 (or 3245046 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 77880984 is about 8825.0203399199. The cubic root of 77880984 is about 427.0484435529.

The spelling of 77880984 in words is "seventy-seven million, eight hundred eighty thousand, nine hundred eighty-four".