990389516 has 12 divisors (see below), whose sum is σ = 1824401880. Its totient is φ = 469131840.

The previous prime is 990389507. The next prime is 990389531. The reversal of 990389516 is 615983099.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6515645 + ... + 6515796.

It is an arithmetic number, because the mean of its divisors is an integer number (152033490).

Almost surely, 2^990389516 is an apocalyptic number.

It is an amenable number.

990389516 is a deficient number, since it is larger than the sum of its proper divisors (834012364).

990389516 is a wasteful number, since it uses less digits than its factorization.

990389516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13031464 (or 13031462 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 990389516 is about 31470.4546519430. The cubic root of 990389516 is about 996.7861878093.

The spelling of 990389516 in words is "nine hundred ninety million, three hundred eighty-nine thousand, five hundred sixteen".