2649664 has 28 divisors (see below), whose sum is σ = 5537200. Its totient is φ = 1254528.

The previous prime is 2649613. The next prime is 2649677. The reversal of 2649664 is 4669462.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127 + ... + 2305.

2^2649664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2649664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2768600).

2649664 is an abundant number, since it is smaller than the sum of its proper divisors (2887536).

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

2649664 is a wasteful number, since it uses less digits than its factorization.

2649664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210 (or 2200 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The square root of 2649664 is about 1627.7788547588. The cubic root of 2649664 is about 138.3769014878.

The spelling of 2649664 in words is "two million, six hundred forty-nine thousand, six hundred sixty-four".