2164638 has 16 divisors (see below), whose sum is σ = 4947840. Its totient is φ = 618456.

The previous prime is 2164633. The next prime is 2164639. The reversal of 2164638 is 8364612.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164633) 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, 25728 + ... + 25811.

It is an arithmetic number, because the mean of its divisors is an integer number (309240).

2^2164638 is an apocalyptic number.

2164638 is an abundant number, since it is smaller than the sum of its proper divisors (2783202).

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

2164638 is a wasteful number, since it uses less digits than its factorization.

2164638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51551.

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

The square root of 2164638 is about 1471.2708792061. The cubic root of 2164638 is about 129.3585362606.

The spelling of 2164638 in words is "two million, one hundred sixty-four thousand, six hundred thirty-eight".