77918982 has 8 divisors (see below), whose sum is σ = 155837976. Its totient is φ = 25972992.

The previous prime is 77918941. The next prime is 77918987. The reversal of 77918982 is 28981977.

It is a sphenic number, since it is the product of 3 distinct primes.

77918982 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77918987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6493243 + ... + 6493254.

It is an arithmetic number, because the mean of its divisors is an integer number (19479747).

Almost surely, 2^77918982 is an apocalyptic number.

77918982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77918982 is a wasteful number, since it uses less digits than its factorization.

77918982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12986502.

The product of its digits is 508032, while the sum is 51.

The square root of 77918982 is about 8827.1729336181. The cubic root of 77918982 is about 427.1178843312.

The spelling of 77918982 in words is "seventy-seven million, nine hundred eighteen thousand, nine hundred eighty-two".