2891431432 has 8 divisors (see below), whose sum is σ = 5421433950. Its totient is φ = 1445715712.

The previous prime is 2891431393. The next prime is 2891431447. The reversal of 2891431432 is 2341341982.

2891431432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2835988516 + 55442916 = 53254^2 + 7446^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2891431391 and 2891431400.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180714457 + ... + 180714472.

Almost surely, 2^2891431432 is an apocalyptic number.

It is an amenable number.

2891431432 is a deficient number, since it is larger than the sum of its proper divisors (2530002518).

2891431432 is a wasteful number, since it uses less digits than its factorization.

2891431432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361428935 (or 361428931 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 2891431432 is about 53772.0320612863. The cubic root of 2891431432 is about 1424.6372618525.

The spelling of 2891431432 in words is "two billion, eight hundred ninety-one million, four hundred thirty-one thousand, four hundred thirty-two".