2406440 has 16 divisors (see below), whose sum is σ = 5414580. Its totient is φ = 962560.

The previous prime is 2406379. The next prime is 2406457. The reversal of 2406440 is 446042.

It can be written as a sum of positive squares in 2 ways, for example, as 2292196 + 114244 = 1514^2 + 338^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 30041 + ... + 30120.

2^2406440 is an apocalyptic number.

2406440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2406440 is an abundant number, since it is smaller than the sum of its proper divisors (3008140).

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

2406440 is a wasteful number, since it uses less digits than its factorization.

2406440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60172 (or 60168 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2406440 is about 1551.2704470852. The cubic root of 2406440 is about 134.0062371790.

The spelling of 2406440 in words is "two million, four hundred six thousand, four hundred forty".