240902409 has 24 divisors (see below), whose sum is σ = 357933856. Its totient is φ = 143985600.

The previous prime is 240902399. The next prime is 240902411. The reversal of 240902409 is 904209042.

240902409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 240902409 - 2⁵ = 240902377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240902479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21954 + ... + 31044.

Almost surely, 2^240902409 is an apocalyptic number.

It is an amenable number.

240902409 is a deficient number, since it is larger than the sum of its proper divisors (117031447).

240902409 is a wasteful number, since it uses less digits than its factorization.

240902409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9189 (or 9178 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 240902409 is about 15521.0311835264. The cubic root of 240902409 is about 622.2244143926.

The spelling of 240902409 in words is "two hundred forty million, nine hundred two thousand, four hundred nine".