320049891 has 24 divisors (see below), whose sum is σ = 528808800. Its totient is φ = 182722176.

The previous prime is 320049839. The next prime is 320049907. The reversal of 320049891 is 198940023.

It is not a de Polignac number, because 320049891 - 2¹¹ = 320047843 is a prime.

It is a super-2 number, since 2×320049891² = 204863865458223762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320049791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124285 + ... + 126833.

It is an arithmetic number, because the mean of its divisors is an integer number (22033700).

Almost surely, 2^320049891 is an apocalyptic number.

320049891 is a deficient number, since it is larger than the sum of its proper divisors (208758909).

320049891 is a wasteful number, since it uses less digits than its factorization.

320049891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555 (or 4552 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 320049891 is about 17889.9382614921. The cubic root of 320049891 is about 684.0259236610.

The spelling of 320049891 in words is "three hundred twenty million, forty-nine thousand, eight hundred ninety-one".