8478990 has 48 divisors (see below), whose sum is σ = 23744448. Its totient is φ = 2086848.

The previous prime is 8478989. The next prime is 8479007. The reversal of 8478990 is 998748.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2454 + ... + 4793.

It is an arithmetic number, because the mean of its divisors is an integer number (494676).

Almost surely, 2^8478990 is an apocalyptic number.

8478990 is an abundant number, since it is smaller than the sum of its proper divisors (15265458).

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

8478990 is a wasteful number, since it uses less digits than its factorization.

8478990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7273 (or 7270 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 8478990 is about 2911.8705328362. The cubic root of 8478990 is about 203.9144681807.

The spelling of 8478990 in words is "eight million, four hundred seventy-eight thousand, nine hundred ninety".