78904372 has 6 divisors (see below), whose sum is σ = 138082658. Its totient is φ = 39452184.

The previous prime is 78904367. The next prime is 78904373. The reversal of 78904372 is 27340987.

It can be written as a sum of positive squares in only one way, i.e., 39891856 + 39012516 = 6316^2 + 6246^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78904373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9863043 + ... + 9863050.

Almost surely, 2^78904372 is an apocalyptic number.

It is an amenable number.

78904372 is a deficient number, since it is larger than the sum of its proper divisors (59178286).

78904372 is a wasteful number, since it uses less digits than its factorization.

78904372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19726097 (or 19726095 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 78904372 is about 8882.8132930958. The cubic root of 78904372 is about 428.9108401021.

The spelling of 78904372 in words is "seventy-eight million, nine hundred four thousand, three hundred seventy-two".