2219664 has 40 divisors (see below), whose sum is σ = 5794272. Its totient is φ = 732160.

The previous prime is 2219647. The next prime is 2219671. The reversal of 2219664 is 4669122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6112 + ... + 6464.

2^2219664 is an apocalyptic number.

2219664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2219664 is an abundant number, since it is smaller than the sum of its proper divisors (3574608).

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

2219664 is a wasteful number, since it uses less digits than its factorization.

2219664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 489 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 2219664 is about 1489.8536840912. The cubic root of 2219664 is about 130.4454933040.

The spelling of 2219664 in words is "two million, two hundred nineteen thousand, six hundred sixty-four".