2157732 has 24 divisors (see below), whose sum is σ = 5594400. Its totient is φ = 719208.

The previous prime is 2157731. The next prime is 2157733. The reversal of 2157732 is 2377512.

It is an interprime number because it is at equal distance from previous prime (2157731) and next prime (2157733).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 2157696 and 2157705.

It is not an unprimeable number, because it can be changed into a prime (2157731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9882 + ... + 10097.

It is an arithmetic number, because the mean of its divisors is an integer number (233100).

2^2157732 is an apocalyptic number.

It is an amenable number.

2157732 is an abundant number, since it is smaller than the sum of its proper divisors (3436668).

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

2157732 is a wasteful number, since it uses less digits than its factorization.

2157732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19992 (or 19984 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 2157732 is about 1468.9220537523. The cubic root of 2157732 is about 129.2208224291.

It can be divided in two parts, 21577 and 32, that added together give a square (21609 = 147²).

The spelling of 2157732 in words is "two million, one hundred fifty-seven thousand, seven hundred thirty-two".