991014912 has 260 divisors, whose sum is σ = 3092266320. Its totient is φ = 315850752.

The previous prime is 991014887. The next prime is 991014971. The reversal of 991014912 is 219410199.

It is a super-2 number, since 2×991014912² = 1964221111612735488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9621453 + ... + 9621555.

It is an arithmetic number, because the mean of its divisors is an integer number (11893332).

Almost surely, 2^991014912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 991014912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1546133160).

991014912 is an abundant number, since it is smaller than the sum of its proper divisors (2101251408).

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

991014912 is a wasteful number, since it uses less digits than its factorization.

991014912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 991014912 is about 31480.3893241491. The cubic root of 991014912 is about 996.9959554193.

The spelling of 991014912 in words is "nine hundred ninety-one million, fourteen thousand, nine hundred twelve".