991498312 has 32 divisors (see below), whose sum is σ = 2126174400. Its totient is φ = 424620864.

The previous prime is 991498307. The next prime is 991498349. The reversal of 991498312 is 213894199.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 82818 + ... + 94030.

It is an arithmetic number, because the mean of its divisors is an integer number (66442950).

Almost surely, 2^991498312 is an apocalyptic number.

It is an amenable number.

991498312 is an abundant number, since it is smaller than the sum of its proper divisors (1134676088).

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

991498312 is a wasteful number, since it uses less digits than its factorization.

991498312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12805 (or 12801 counting only the distinct ones).

The product of its digits is 139968, while the sum is 46.

The square root of 991498312 is about 31488.0661838735. The cubic root of 991498312 is about 997.1580348856.

The spelling of 991498312 in words is "nine hundred ninety-one million, four hundred ninety-eight thousand, three hundred twelve".