990002456 has 8 divisors (see below), whose sum is σ = 1856254620. Its totient is φ = 495001224.

The previous prime is 990002443. The next prime is 990002471. The reversal of 990002456 is 654200099.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61875146 + ... + 61875161.

Almost surely, 2^990002456 is an apocalyptic number.

It is an amenable number.

990002456 is a deficient number, since it is larger than the sum of its proper divisors (866252164).

990002456 is a wasteful number, since it uses less digits than its factorization.

990002456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123750313 (or 123750309 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 990002456 is about 31464.3044734823. The cubic root of 990002456 is about 996.6563175822.

The spelling of 990002456 in words is "nine hundred ninety million, two thousand, four hundred fifty-six".