2311991896 has 64 divisors (see below), whose sum is σ = 4636850400. Its totient is φ = 1077608448.

The previous prime is 2311991887. The next prime is 2311991897. The reversal of 2311991896 is 6981991132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311991897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3435016 + ... + 3435688.

Almost surely, 2^2311991896 is an apocalyptic number.

It is an amenable number.

2311991896 is an abundant number, since it is smaller than the sum of its proper divisors (2324858504).

2311991896 is a wasteful number, since it uses less digits than its factorization.

2311991896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 1024 counting only the distinct ones).

The product of its digits is 209952, while the sum is 49.

The square root of 2311991896 is about 48083.1768501209. The cubic root of 2311991896 is about 1322.2962587213.

The spelling of 2311991896 in words is "two billion, three hundred eleven million, nine hundred ninety-one thousand, eight hundred ninety-six".