990503404 has 24 divisors (see below), whose sum is σ = 1902575808. Its totient is φ = 447463440.

The previous prime is 990503401. The next prime is 990503417. The reversal of 990503404 is 404305099.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 990503404.

It is not an unprimeable number, because it can be changed into a prime (990503401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61882 + ... + 76225.

It is an arithmetic number, because the mean of its divisors is an integer number (79273992).

Almost surely, 2^990503404 is an apocalyptic number.

It is an amenable number.

990503404 is a deficient number, since it is larger than the sum of its proper divisors (912072404).

990503404 is a wasteful number, since it uses less digits than its factorization.

990503404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138285 (or 138283 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 990503404 is about 31472.2640431222. The cubic root of 990503404 is about 996.8243942026.

The spelling of 990503404 in words is "nine hundred ninety million, five hundred three thousand, four hundred four".