77304388 has 48 divisors (see below), whose sum is σ = 163609600. Its totient is φ = 31220640.

The previous prime is 77304377. The next prime is 77304391. The reversal of 77304388 is 88340377.

It is a self number, because there is not a number n which added to its sum of digits gives 77304388.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175873 + ... + 176311.

Almost surely, 2^77304388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77304388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81804800).

77304388 is an abundant number, since it is smaller than the sum of its proper divisors (86305212).

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

77304388 is a wasteful number, since it uses less digits than its factorization.

77304388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 77304388 is about 8792.2913964450. The cubic root of 77304388 is about 425.9919400122.

The spelling of 77304388 in words is "seventy-seven million, three hundred four thousand, three hundred eighty-eight".