240991538 has 8 divisors (see below), whose sum is σ = 361573632. Its totient is φ = 120466996.

The previous prime is 240991523. The next prime is 240991549. The reversal of 240991538 is 835199042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 240991495 and 240991504.

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, 1670 + ... + 22017.

It is an arithmetic number, because the mean of its divisors is an integer number (45196704).

Almost surely, 2^240991538 is an apocalyptic number.

240991538 is a deficient number, since it is larger than the sum of its proper divisors (120582094).

240991538 is a wasteful number, since it uses less digits than its factorization.

240991538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28776.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 240991538 is about 15523.9021511990. The cubic root of 240991538 is about 622.3011417307.

The spelling of 240991538 in words is "two hundred forty million, nine hundred ninety-one thousand, five hundred thirty-eight".