2115688 has 32 divisors (see below), whose sum is σ = 4320000. Its totient is φ = 967680.

The previous prime is 2115683. The next prime is 2115689. The reversal of 2115688 is 8865112.

It is a super-2 number, since 2×2115688² = 8952271426688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (2115683) 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, 4488 + ... + 4936.

It is an arithmetic number, because the mean of its divisors is an integer number (135000).

2^2115688 is an apocalyptic number.

It is an amenable number.

2115688 is an abundant number, since it is smaller than the sum of its proper divisors (2204312).

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

2115688 is a wasteful number, since it uses less digits than its factorization.

2115688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 501 counting only the distinct ones).

The product of its digits is 3840, while the sum is 31.

The square root of 2115688 is about 1454.5404772642. The cubic root of 2115688 is about 128.3760102437.

The spelling of 2115688 in words is "two million, one hundred fifteen thousand, six hundred eighty-eight".