2138543392 has 24 divisors (see below), whose sum is σ = 4228819056. Its totient is φ = 1064557632.

The previous prime is 2138543387. The next prime is 2138543399. The reversal of 2138543392 is 2933458312.

It is not an unprimeable number, because it can be changed into a prime (2138543399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139938 + ... + 154465.

It is an arithmetic number, because the mean of its divisors is an integer number (176200794).

Almost surely, 2^2138543392 is an apocalyptic number.

It is an amenable number.

2138543392 is a deficient number, since it is larger than the sum of its proper divisors (2090275664).

2138543392 is a wasteful number, since it uses less digits than its factorization.

2138543392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294640 (or 294632 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 2138543392 is about 46244.3876811014. The cubic root of 2138543392 is about 1288.3662975770.

The spelling of 2138543392 in words is "two billion, one hundred thirty-eight million, five hundred forty-three thousand, three hundred ninety-two".