2173287940 has 48 divisors (see below), whose sum is σ = 4873131648. Its totient is φ = 812173824.

The previous prime is 2173287929. The next prime is 2173287979. The reversal of 2173287940 is 497823712.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35157 + ... + 74716.

It is an arithmetic number, because the mean of its divisors is an integer number (101523576).

Almost surely, 2^2173287940 is an apocalyptic number.

2173287940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2173287940 is an abundant number, since it is smaller than the sum of its proper divisors (2699843708).

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

2173287940 is a wasteful number, since it uses less digits than its factorization.

2173287940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109948 (or 109946 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 2173287940 is about 46618.5364420635. The cubic root of 2173287940 is about 1295.3061375289.

The spelling of 2173287940 in words is "two billion, one hundred seventy-three million, two hundred eighty-seven thousand, nine hundred forty".