2179257894 has 48 divisors (see below), whose sum is σ = 5290206480. Its totient is φ = 642530880.

The previous prime is 2179257881. The next prime is 2179257901. The reversal of 2179257894 is 4987529712.

It is a super-2 number, since 2×2179257894² = 9498329937122630472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2179257894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141409 + ... + 156060.

It is an arithmetic number, because the mean of its divisors is an integer number (110212635).

Almost surely, 2^2179257894 is an apocalyptic number.

2179257894 is an abundant number, since it is smaller than the sum of its proper divisors (3110948586).

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

2179257894 is a wasteful number, since it uses less digits than its factorization.

2179257894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297525 (or 297522 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 2179257894 is about 46682.5223611578. The cubic root of 2179257894 is about 1296.4911083139.

The spelling of 2179257894 in words is "two billion, one hundred seventy-nine million, two hundred fifty-seven thousand, eight hundred ninety-four".