78632990 has 16 divisors (see below), whose sum is σ = 149865552. Its totient is φ = 29602944.

The previous prime is 78632987. The next prime is 78633011. The reversal of 78632990 is 9923687.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231104 + ... + 231443.

It is an arithmetic number, because the mean of its divisors is an integer number (9366597).

Almost surely, 2^78632990 is an apocalyptic number.

78632990 is a deficient number, since it is larger than the sum of its proper divisors (71232562).

78632990 is a wasteful number, since it uses less digits than its factorization.

78632990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462571.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 78632990 is about 8867.5244572541. The cubic root of 78632990 is about 428.4185463690.

The spelling of 78632990 in words is "seventy-eight million, six hundred thirty-two thousand, nine hundred ninety".