2159972394 has 8 divisors (see below), whose sum is σ = 4319944800. Its totient is φ = 719990796.

The previous prime is 2159972393. The next prime is 2159972401. The reversal of 2159972394 is 4932799512.

It is a sphenic number, since it is the product of 3 distinct primes.

2159972394 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2159972393) 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, 179997694 + ... + 179997705.

It is an arithmetic number, because the mean of its divisors is an integer number (539993100).

Almost surely, 2^2159972394 is an apocalyptic number.

2159972394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2159972394 is a wasteful number, since it uses less digits than its factorization.

2159972394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359995404.

The product of its digits is 1224720, while the sum is 51.

The square root of 2159972394 is about 46475.5031602671. The cubic root of 2159972394 is about 1292.6553070212.

The spelling of 2159972394 in words is "two billion, one hundred fifty-nine million, nine hundred seventy-two thousand, three hundred ninety-four".