2631664 has 20 divisors (see below), whose sum is σ = 5827504. Its totient is φ = 1127808.

The previous prime is 2631661. The next prime is 2631679. The reversal of 2631664 is 4661362.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631661) 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, 11637 + ... + 11860.

2^2631664 is an apocalyptic number.

It is an amenable number.

2631664 is an abundant number, since it is smaller than the sum of its proper divisors (3195840).

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

2631664 is a wasteful number, since it uses less digits than its factorization.

2631664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23512 (or 23506 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 2631664 is about 1622.2404260775. The cubic root of 2631664 is about 138.0628433233.

The spelling of 2631664 in words is "two million, six hundred thirty-one thousand, six hundred sixty-four".