2944640 has 64 divisors (see below), whose sum is σ = 7270560. Its totient is φ = 1139712.

The previous prime is 2944637. The next prime is 2944657. The reversal of 2944640 is 464492.

It is a tau number, because it is divible by the number of its divisors (64).

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, 27467 + ... + 27573.

2^2944640 is an apocalyptic number.

2944640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2944640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3635280).

2944640 is an abundant number, since it is smaller than the sum of its proper divisors (4325920).

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

2944640 is a wasteful number, since it uses less digits than its factorization.

2944640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 2944640 is about 1715.9953379890. The cubic root of 2944640 is about 143.3322997341.

The spelling of 2944640 in words is "two million, nine hundred forty-four thousand, six hundred forty".