249742338 has 8 divisors (see below), whose sum is σ = 499484688. Its totient is φ = 83247444.

The previous prime is 249742313. The next prime is 249742379. The reversal of 249742338 is 833247942.

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

249742338 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 249742338.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20811856 + ... + 20811867.

It is an arithmetic number, because the mean of its divisors is an integer number (62435586).

Almost surely, 2^249742338 is an apocalyptic number.

249742338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

249742338 is a wasteful number, since it uses less digits than its factorization.

249742338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41623728.

The product of its digits is 290304, while the sum is 42.

The square root of 249742338 is about 15803.2382124677. The cubic root of 249742338 is about 629.7440280347.

The spelling of 249742338 in words is "two hundred forty-nine million, seven hundred forty-two thousand, three hundred thirty-eight".