2157044394 has 16 divisors (see below), whose sum is σ = 4314545280. Its totient is φ = 718938720.

The previous prime is 2157044377. The next prime is 2157044411. The reversal of 2157044394 is 4934407512.

It is an interprime number because it is at equal distance from previous prime (2157044377) and next prime (2157044411).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94854 + ... + 115374.

It is an arithmetic number, because the mean of its divisors is an integer number (269659080).

Almost surely, 2^2157044394 is an apocalyptic number.

2157044394 is an abundant number, since it is smaller than the sum of its proper divisors (2157500886).

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

2157044394 is a wasteful number, since it uses less digits than its factorization.

2157044394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38045.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 2157044394 is about 46443.9920118846. The cubic root of 2157044394 is about 1292.0709467346.

The spelling of 2157044394 in words is "two billion, one hundred fifty-seven million, forty-four thousand, three hundred ninety-four".