240409091 has 12 divisors (see below), whose sum is σ = 267367392. Its totient is φ = 215912736.

The previous prime is 240409079. The next prime is 240409093. The reversal of 240409091 is 190904042.

It is a de Polignac number, because none of the positive numbers 2^k-240409091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240409093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12971 + ... + 25476.

It is an arithmetic number, because the mean of its divisors is an integer number (22280616).

Almost surely, 2^240409091 is an apocalyptic number.

240409091 is a deficient number, since it is larger than the sum of its proper divisors (26958301).

240409091 is a wasteful number, since it uses less digits than its factorization.

240409091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38510 (or 38497 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 240409091 is about 15505.1311184395. The cubic root of 240409091 is about 621.7993954399.

The spelling of 240409091 in words is "two hundred forty million, four hundred nine thousand, ninety-one".