77818968 has 40 divisors (see below), whose sum is σ = 217966980. Its totient is φ = 25939440.

The previous prime is 77818967. The next prime is 77818969. The reversal of 77818968 is 86981877.

It is an interprime number because it is at equal distance from previous prime (77818967) and next prime (77818969).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77818963) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 59398 + ... + 60693.

Almost surely, 2^77818968 is an apocalyptic number.

It is an amenable number.

77818968 is an abundant number, since it is smaller than the sum of its proper divisors (140148012).

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

77818968 is a wasteful number, since it uses less digits than its factorization.

77818968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120109 (or 120096 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 77818968 is about 8821.5059938766. The cubic root of 77818968 is about 426.9350617077.

The spelling of 77818968 in words is "seventy-seven million, eight hundred eighteen thousand, nine hundred sixty-eight".