2167172840 has 32 divisors (see below), whose sum is σ = 5572730880. Its totient is φ = 743030592.

The previous prime is 2167172807. The next prime is 2167172921. The reversal of 2167172840 is 482717612.

It is a junction number, because it is equal to n+sod(n) for n = 2167172794 and 2167172803.

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, 3869672 + ... + 3870231.

It is an arithmetic number, because the mean of its divisors is an integer number (174147840).

Almost surely, 2^2167172840 is an apocalyptic number.

2167172840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2167172840 is an abundant number, since it is smaller than the sum of its proper divisors (3405558040).

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

2167172840 is a wasteful number, since it uses less digits than its factorization.

2167172840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7739921 (or 7739917 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 2167172840 is about 46552.9036688368. The cubic root of 2167172840 is about 1294.0901048635.

The spelling of 2167172840 in words is "two billion, one hundred sixty-seven million, one hundred seventy-two thousand, eight hundred forty".