2640412 has 6 divisors (see below), whose sum is σ = 4620728. Its totient is φ = 1320204.

The previous prime is 2640409. The next prime is 2640497. The reversal of 2640412 is 2140462.

It is a self number, because there is not a number n which added to its sum of digits gives 2640412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330048 + ... + 330055.

2^2640412 is an apocalyptic number.

It is an amenable number.

2640412 is a deficient number, since it is larger than the sum of its proper divisors (1980316).

2640412 is a wasteful number, since it uses less digits than its factorization.

2640412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660107 (or 660105 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2640412 is about 1624.9344602168. The cubic root of 2640412 is about 138.2156538585.

Adding to 2640412 its reverse (2140462), we get a palindrome (4780874).

The spelling of 2640412 in words is "two million, six hundred forty thousand, four hundred twelve".