990307579490 has 32 divisors (see below), whose sum is σ = 1840130942976. Its totient is φ = 383329126080.

The previous prime is 990307579399. The next prime is 990307579531. The reversal of 990307579490 is 94975703099.

It is a Harshad number since it is a multiple of its sum of digits (62).

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, 9964484 + ... + 10063376.

It is an arithmetic number, because the mean of its divisors is an integer number (57504091968).

Almost surely, 2^990307579490 is an apocalyptic number.

990307579490 is a deficient number, since it is larger than the sum of its proper divisors (849823363486).

990307579490 is a wasteful number, since it uses less digits than its factorization.

990307579490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131234.

The product of its (nonzero) digits is 19289340, while the sum is 62.

The spelling of 990307579490 in words is "nine hundred ninety billion, three hundred seven million, five hundred seventy-nine thousand, four hundred ninety".