990331470 has 48 divisors (see below), whose sum is σ = 2686817952. Its totient is φ = 252605760.

The previous prime is 990331451. The next prime is 990331477. The reversal of 990331470 is 74133099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990331477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237141 + ... + 241280.

It is an arithmetic number, because the mean of its divisors is an integer number (55975374).

Almost surely, 2^990331470 is an apocalyptic number.

990331470 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

990331470 is an abundant number, since it is smaller than the sum of its proper divisors (1696486482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

990331470 is a wasteful number, since it uses less digits than its factorization.

990331470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478457 (or 478454 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 990331470 is about 31469.5324083470. The cubic root of 990331470 is about 996.7667137941.

The spelling of 990331470 in words is "nine hundred ninety million, three hundred thirty-one thousand, four hundred seventy".