2158106840 has 16 divisors (see below), whose sum is σ = 4855740480. Its totient is φ = 863242720.

The previous prime is 2158106761. The next prime is 2158106851. The reversal of 2158106840 is 486018512.

It is a self number, because there is not a number n which added to its sum of digits gives 2158106840.

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, 26976296 + ... + 26976375.

It is an arithmetic number, because the mean of its divisors is an integer number (303483780).

Almost surely, 2^2158106840 is an apocalyptic number.

2158106840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2158106840 is an abundant number, since it is smaller than the sum of its proper divisors (2697633640).

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

2158106840 is a wasteful number, since it uses less digits than its factorization.

2158106840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53952682 (or 53952678 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 2158106840 is about 46455.4285310124. The cubic root of 2158106840 is about 1292.2830471890.

The spelling of 2158106840 in words is "two billion, one hundred fifty-eight million, one hundred six thousand, eight hundred forty".