2158940870 has 16 divisors (see below), whose sum is σ = 3886656480. Its totient is φ = 863451264.

The previous prime is 2158940831. The next prime is 2158940879. The reversal of 2158940870 is 780498512.

It is a super-2 number, since 2×2158940870² = 9322051360312713800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158940879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92399 + ... + 113381.

It is an arithmetic number, because the mean of its divisors is an integer number (242916030).

Almost surely, 2^2158940870 is an apocalyptic number.

2158940870 is a deficient number, since it is larger than the sum of its proper divisors (1727715610).

2158940870 is a wasteful number, since it uses less digits than its factorization.

2158940870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31279.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 2158940870 is about 46464.4043327793. The cubic root of 2158940870 is about 1292.4494992534.

The spelling of 2158940870 in words is "two billion, one hundred fifty-eight million, nine hundred forty thousand, eight hundred seventy".