991076604 has 48 divisors (see below), whose sum is σ = 2646798336. Its totient is φ = 282744000.

The previous prime is 991076579. The next prime is 991076617. The reversal of 991076604 is 406670199.

991076604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50469 + ... + 67299.

It is an arithmetic number, because the mean of its divisors is an integer number (55141632).

Almost surely, 2^991076604 is an apocalyptic number.

It is an amenable number.

991076604 is an abundant number, since it is smaller than the sum of its proper divisors (1655721732).

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

991076604 is a wasteful number, since it uses less digits than its factorization.

991076604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17546 (or 17544 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 991076604 is about 31481.3691570109. The cubic root of 991076604 is about 997.0166430993.

The spelling of 991076604 in words is "nine hundred ninety-one million, seventy-six thousand, six hundred four".