991464000 has 224 divisors, whose sum is σ = 3312566400. Its totient is φ = 261273600.

The previous prime is 991463999. The next prime is 991464011. The reversal of 991464000 is 464199.

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 31 ways as a sum of consecutive naturals, for example, 2615811 + ... + 2616189.

Almost surely, 2^991464000 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 991464000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1656283200).

991464000 is an abundant number, since it is smaller than the sum of its proper divisors (2321102400).

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

991464000 is a wasteful number, since it uses less digits than its factorization.

991464000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 498 counting only the distinct ones).

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

The square root of 991464000 is about 31487.5213378252. The cubic root of 991464000 is about 997.1465321324.

The spelling of 991464000 in words is "nine hundred ninety-one million, four hundred sixty-four thousand".