78672990 has 48 divisors (see below), whose sum is σ = 207550224. Its totient is φ = 19071360.

The previous prime is 78672983. The next prime is 78673003. The reversal of 78672990 is 9927687.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7207 + ... + 14466.

It is an arithmetic number, because the mean of its divisors is an integer number (4323963).

Almost surely, 2^78672990 is an apocalyptic number.

78672990 is an abundant number, since it is smaller than the sum of its proper divisors (128877234).

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

78672990 is a wasteful number, since it uses less digits than its factorization.

78672990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21705 (or 21694 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 78672990 is about 8869.7795913991. The cubic root of 78672990 is about 428.4911784661.

The spelling of 78672990 in words is "seventy-eight million, six hundred seventy-two thousand, nine hundred ninety".