77404432 has 20 divisors (see below), whose sum is σ = 171395776. Its totient is φ = 33173280.

The previous prime is 77404421. The next prime is 77404463. The reversal of 77404432 is 23440477.

It is a junction number, because it is equal to n+sod(n) for n = 77404394 and 77404403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345444 + ... + 345667.

Almost surely, 2^77404432 is an apocalyptic number.

It is an amenable number.

77404432 is an abundant number, since it is smaller than the sum of its proper divisors (93991344).

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

77404432 is a wasteful number, since it uses less digits than its factorization.

77404432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691126 (or 691120 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 77404432 is about 8797.9788588062. The cubic root of 77404432 is about 426.1756275846.

The spelling of 77404432 in words is "seventy-seven million, four hundred four thousand, four hundred thirty-two".