77440404 has 12 divisors (see below), whose sum is σ = 180694304. Its totient is φ = 25813464.

The previous prime is 77440393. The next prime is 77440421. The reversal of 77440404 is 40404477.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 3226672 + ... + 3226695.

Almost surely, 2^77440404 is an apocalyptic number.

It is an amenable number.

77440404 is an abundant number, since it is smaller than the sum of its proper divisors (103253900).

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

77440404 is a wasteful number, since it uses less digits than its factorization.

77440404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6453374 (or 6453372 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 77440404 is about 8800.0229545155. The cubic root of 77440404 is about 426.2416359301.

The spelling of 77440404 in words is "seventy-seven million, four hundred forty thousand, four hundred four".