2170840940 has 24 divisors (see below), whose sum is σ = 4669957152. Its totient is φ = 847157120.

The previous prime is 2170840913. The next prime is 2170840951. The reversal of 2170840940 is 490480712.

It is a self number, because there is not a number n which added to its sum of digits gives 2170840940.

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, 1322864 + ... + 1324503.

It is an arithmetic number, because the mean of its divisors is an integer number (194581548).

Almost surely, 2^2170840940 is an apocalyptic number.

2170840940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2170840940 is an abundant number, since it is smaller than the sum of its proper divisors (2499116212).

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

2170840940 is a wasteful number, since it uses less digits than its factorization.

2170840940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647417 (or 2647415 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 2170840940 is about 46592.2841251639. The cubic root of 2170840940 is about 1294.8198076679.

The spelling of 2170840940 in words is "two billion, one hundred seventy million, eight hundred forty thousand, nine hundred forty".