990399502 has 8 divisors (see below), whose sum is σ = 1485871200. Its totient is φ = 495109104.

The previous prime is 990399469. The next prime is 990399511. The reversal of 990399502 is 205993099.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30727 + ... + 54082.

It is an arithmetic number, because the mean of its divisors is an integer number (185733900).

Almost surely, 2^990399502 is an apocalyptic number.

990399502 is a deficient number, since it is larger than the sum of its proper divisors (495471698).

990399502 is a wasteful number, since it uses less digits than its factorization.

990399502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90650.

The product of its (nonzero) digits is 196830, while the sum is 46.

The square root of 990399502 is about 31470.6133082913. The cubic root of 990399502 is about 996.7895379637.

The spelling of 990399502 in words is "nine hundred ninety million, three hundred ninety-nine thousand, five hundred two".