89878990 has 16 divisors (see below), whose sum is σ = 164835648. Its totient is φ = 35273056.

The previous prime is 89878981. The next prime is 89879039. The reversal of 89878990 is 9987898.

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, 84262 + ... + 85321.

It is an arithmetic number, because the mean of its divisors is an integer number (10302228).

Almost surely, 2^89878990 is an apocalyptic number.

89878990 is a deficient number, since it is larger than the sum of its proper divisors (74956658).

89878990 is a wasteful number, since it uses less digits than its factorization.

89878990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169643.

The product of its (nonzero) digits is 2612736, while the sum is 58.

The square root of 89878990 is about 9480.4530482462. The cubic root of 89878990 is about 447.9395346488.

The spelling of 89878990 in words is "eighty-nine million, eight hundred seventy-eight thousand, nine hundred ninety".