2405636 has 18 divisors (see below), whose sum is σ = 4474218. Its totient is φ = 1131520.

The previous prime is 2405633. The next prime is 2405651. The reversal of 2405636 is 6365042.

It can be written as a sum of positive squares in 3 ways, for example, as 828100 + 1577536 = 910^2 + 1256^2 .

It is not an unprimeable number, because it can be changed into a prime (2405633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116 + ... + 2196.

2^2405636 is an apocalyptic number.

It is an amenable number.

2405636 is a deficient number, since it is larger than the sum of its proper divisors (2068582).

2405636 is a wasteful number, since it uses less digits than its factorization.

2405636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119 (or 2100 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2405636 is about 1551.0112830022. The cubic root of 2405636 is about 133.9913115329.

The spelling of 2405636 in words is "two million, four hundred five thousand, six hundred thirty-six".