249985930 has 16 divisors (see below), whose sum is σ = 457352424. Its totient is φ = 98354880.

The previous prime is 249985927. The next prime is 249985937. The reversal of 249985930 is 39589942.

It can be written as a sum of positive squares in 4 ways, for example, as 161569521 + 88416409 = 12711^2 + 9403^2 .

It is not an unprimeable number, because it can be changed into a prime (249985937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204297 + ... + 205516.

Almost surely, 2^249985930 is an apocalyptic number.

249985930 is a deficient number, since it is larger than the sum of its proper divisors (207366494).

249985930 is a wasteful number, since it uses less digits than its factorization.

249985930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409881.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 249985930 is about 15810.9433621147. The cubic root of 249985930 is about 629.9487066663.

The spelling of 249985930 in words is "two hundred forty-nine million, nine hundred eighty-five thousand, nine hundred thirty".