990859580 has 48 divisors (see below), whose sum is σ = 2097960480. Its totient is φ = 393093888.

The previous prime is 990859577. The next prime is 990859589. The reversal of 990859580 is 85958099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990859589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2364611 + ... + 2365029.

It is an arithmetic number, because the mean of its divisors is an integer number (43707510).

Almost surely, 2^990859580 is an apocalyptic number.

It is an amenable number.

990859580 is an abundant number, since it is smaller than the sum of its proper divisors (1107100900).

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

990859580 is a wasteful number, since it uses less digits than its factorization.

990859580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 53.

The square root of 990859580 is about 31477.9221042305. The cubic root of 990859580 is about 996.9438628739.

The spelling of 990859580 in words is "nine hundred ninety million, eight hundred fifty-nine thousand, five hundred eighty".