78996404 has 6 divisors (see below), whose sum is σ = 138243714. Its totient is φ = 39498200.

The previous prime is 78996397. The next prime is 78996419. The reversal of 78996404 is 40469987.

It can be written as a sum of positive squares in only one way, i.e., 42876304 + 36120100 = 6548^2 + 6010^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9874547 + ... + 9874554.

It is an arithmetic number, because the mean of its divisors is an integer number (23040619).

Almost surely, 2^78996404 is an apocalyptic number.

It is an amenable number.

78996404 is a deficient number, since it is larger than the sum of its proper divisors (59247310).

78996404 is a wasteful number, since it uses less digits than its factorization.

78996404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19749105 (or 19749103 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 78996404 is about 8887.9921242089. The cubic root of 78996404 is about 429.0775321135.

The spelling of 78996404 in words is "seventy-eight million, nine hundred ninety-six thousand, four hundred four".