77474988 has 48 divisors (see below), whose sum is σ = 205148160. Its totient is φ = 25273872.

The previous prime is 77474977. The next prime is 77475019. The reversal of 77474988 is 88947477.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2556 + ... + 12707.

It is an arithmetic number, because the mean of its divisors is an integer number (4273920).

Almost surely, 2^77474988 is an apocalyptic number.

It is an amenable number.

77474988 is an abundant number, since it is smaller than the sum of its proper divisors (127673172).

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

77474988 is a wasteful number, since it uses less digits than its factorization.

77474988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15323 (or 15315 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 77474988 is about 8801.9877300528. The cubic root of 77474988 is about 426.3050780357.

The spelling of 77474988 in words is "seventy-seven million, four hundred seventy-four thousand, nine hundred eighty-eight".