2136864 has 24 divisors (see below), whose sum is σ = 5609520. Its totient is φ = 712256.

The previous prime is 2136863. The next prime is 2136877. The reversal of 2136864 is 4686312.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2136863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11034 + ... + 11225.

It is an arithmetic number, because the mean of its divisors is an integer number (233730).

2^2136864 is an apocalyptic number.

2136864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2136864 is an abundant number, since it is smaller than the sum of its proper divisors (3472656).

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

2136864 is a wasteful number, since it uses less digits than its factorization.

2136864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22272 (or 22264 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 2136864 is about 1461.8016281288. The cubic root of 2136864 is about 128.8028959137.

The spelling of 2136864 in words is "two million, one hundred thirty-six thousand, eight hundred sixty-four".