2159778392 has 16 divisors (see below), whose sum is σ = 4051193400. Its totient is φ = 1079460160.

The previous prime is 2159778389. The next prime is 2159778403. The reversal of 2159778392 is 2938779512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31709 + ... + 72972.

Almost surely, 2^2159778392 is an apocalyptic number.

It is an amenable number.

2159778392 is a deficient number, since it is larger than the sum of its proper divisors (1891415008).

2159778392 is a wasteful number, since it uses less digits than its factorization.

2159778392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107266 (or 107262 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 53.

The square root of 2159778392 is about 46473.4159708537. The cubic root of 2159778392 is about 1292.6166051032.

The spelling of 2159778392 in words is "two billion, one hundred fifty-nine million, seven hundred seventy-eight thousand, three hundred ninety-two".