240139998 has 32 divisors (see below), whose sum is σ = 609880320. Its totient is φ = 68611320.

The previous prime is 240139973. The next prime is 240140009. The reversal of 240139998 is 899931042.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317268 + ... + 318023.

It is an arithmetic number, because the mean of its divisors is an integer number (19058760).

Almost surely, 2^240139998 is an apocalyptic number.

240139998 is an abundant number, since it is smaller than the sum of its proper divisors (369740322).

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

240139998 is a wasteful number, since it uses less digits than its factorization.

240139998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635309 (or 635303 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 240139998 is about 15496.4511421164. The cubic root of 240139998 is about 621.5673127964.

The spelling of 240139998 in words is "two hundred forty million, one hundred thirty-nine thousand, nine hundred ninety-eight".