2137640 has 16 divisors (see below), whose sum is σ = 4809780. Its totient is φ = 855040.

The previous prime is 2137637. The next prime is 2137669. The reversal of 2137640 is 467312.

It can be written as a sum of positive squares in 2 ways, for example, as 2137444 + 196 = 1462^2 + 14^2 .

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, 26681 + ... + 26760.

2^2137640 is an apocalyptic number.

2137640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2137640 is an abundant number, since it is smaller than the sum of its proper divisors (2672140).

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

2137640 is a wasteful number, since it uses less digits than its factorization.

2137640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53452 (or 53448 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 2137640 is about 1462.0670299272. The cubic root of 2137640 is about 128.8184855738.

The spelling of 2137640 in words is "two million, one hundred thirty-seven thousand, six hundred forty".