2920644 has 24 divisors (see below), whose sum is σ = 7572320. Its totient is φ = 973512.

The previous prime is 2920637. The next prime is 2920649. The reversal of 2920644 is 4460292.

2920644 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2920644² = 17060322749472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2920649) 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, 13414 + ... + 13629.

2^2920644 is an apocalyptic number.

It is an amenable number.

2920644 is an abundant number, since it is smaller than the sum of its proper divisors (4651676).

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

2920644 is a wasteful number, since it uses less digits than its factorization.

2920644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27056 (or 27048 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 2920644 is about 1708.9891749218. The cubic root of 2920644 is about 142.9418969454.

Adding to 2920644 its product of nonzero digits (3456), we get a square (2924100 = 1710²).

The spelling of 2920644 in words is "two million, nine hundred twenty thousand, six hundred forty-four".