78990590 has 32 divisors (see below), whose sum is σ = 162846720. Its totient is φ = 27023904.

The previous prime is 78990563. The next prime is 78990601. The reversal of 78990590 is 9509987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42419 + ... + 44241.

It is an arithmetic number, because the mean of its divisors is an integer number (5088960).

Almost surely, 2^78990590 is an apocalyptic number.

78990590 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78990590 is an abundant number, since it is smaller than the sum of its proper divisors (83856130).

78990590 is a wasteful number, since it uses less digits than its factorization.

78990590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 78990590 is about 8887.6650476939. The cubic root of 78990590 is about 429.0670053981.

The spelling of 78990590 in words is "seventy-eight million, nine hundred ninety thousand, five hundred ninety".