2688157 has 4 divisors (see below), whose sum is σ = 2712060. Its totient is φ = 2664256.

The previous prime is 2688143. The next prime is 2688167. The reversal of 2688157 is 7518862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 210681 + 2477476 = 459^2 + 1574^2 .

It is a cyclic number.

It is not a de Polignac number, because 2688157 - 2¹⁹ = 2163869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2688137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11782 + ... + 12007.

It is an arithmetic number, because the mean of its divisors is an integer number (678015).

2^2688157 is an apocalyptic number.

It is an amenable number.

2688157 is a deficient number, since it is larger than the sum of its proper divisors (23903).

2688157 is a wasteful number, since it uses less digits than its factorization.

2688157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23902.

The product of its digits is 26880, while the sum is 37.

The square root of 2688157 is about 1639.5600019517. The cubic root of 2688157 is about 139.0437727675.

The spelling of 2688157 in words is "two million, six hundred eighty-eight thousand, one hundred fifty-seven".