77904398 has 24 divisors (see below), whose sum is σ = 138331704. Its totient is φ = 32685840.

The previous prime is 77904397. The next prime is 77904401. The reversal of 77904398 is 89340977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77904397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9236 + ... + 15527.

It is an arithmetic number, because the mean of its divisors is an integer number (5763821).

Almost surely, 2^77904398 is an apocalyptic number.

77904398 is a deficient number, since it is larger than the sum of its proper divisors (60427306).

77904398 is a wasteful number, since it uses less digits than its factorization.

77904398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24800 (or 24789 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 77904398 is about 8826.3468094110. The cubic root of 77904398 is about 427.0912349588.

The spelling of 77904398 in words is "seventy-seven million, nine hundred four thousand, three hundred ninety-eight".