991464 has 32 divisors (see below), whose sum is σ = 2508000. Its totient is φ = 326592.

The previous prime is 991453. The next prime is 991483. The reversal of 991464 is 464199.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2427 + ... + 2805.

It is an arithmetic number, because the mean of its divisors is an integer number (78375).

2⁹⁹¹⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

991464 is an abundant number, since it is smaller than the sum of its proper divisors (1516536).

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

991464 is a wasteful number, since it uses less digits than its factorization.

991464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 493 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 991464 is about 995.7228530068. The cubic root of 991464 is about 99.7146532132.

The spelling of 991464 in words is "nine hundred ninety-one thousand, four hundred sixty-four".