249870730 has 16 divisors (see below), whose sum is σ = 450198504. Its totient is φ = 99852480.

The previous prime is 249870713. The next prime is 249870763. The reversal of 249870730 is 37078942.

It can be written as a sum of positive squares in 4 ways, for example, as 245329569 + 4541161 = 15663^2 + 2131^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501 + ... + 22360.

Almost surely, 2^249870730 is an apocalyptic number.

249870730 is a deficient number, since it is larger than the sum of its proper divisors (200327774).

249870730 is a wasteful number, since it uses less digits than its factorization.

249870730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23961.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 249870730 is about 15807.2998959342. The cubic root of 249870730 is about 629.8519262311.

The spelling of 249870730 in words is "two hundred forty-nine million, eight hundred seventy thousand, seven hundred thirty".