249850138 has 8 divisors (see below), whose sum is σ = 387698580. Its totient is φ = 120617280.

The previous prime is 249850123. The next prime is 249850141. The reversal of 249850138 is 831058942.

249850138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 225810729 + 24039409 = 15027^2 + 4903^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 249850138.

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, 2153823 + ... + 2153938.

Almost surely, 2^249850138 is an apocalyptic number.

249850138 is a deficient number, since it is larger than the sum of its proper divisors (137848442).

249850138 is a wasteful number, since it uses less digits than its factorization.

249850138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307792.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 249850138 is about 15806.6485378780. The cubic root of 249850138 is about 629.8346235947.

The spelling of 249850138 in words is "two hundred forty-nine million, eight hundred fifty thousand, one hundred thirty-eight".