249025690 has 32 divisors (see below), whose sum is σ = 476213904. Its totient is φ = 93434880.

The previous prime is 249025687. The next prime is 249025691. The reversal of 249025690 is 96520942.

It can be written as a sum of positive squares in 8 ways, for example, as 62457409 + 186568281 = 7903^2 + 13659^2 .

It is a super-2 number, since 2×249025690² = 124027588559952200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (249025691) 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 15 ways as a sum of consecutive naturals, for example, 51580 + ... + 56200.

Almost surely, 2^249025690 is an apocalyptic number.

249025690 is a deficient number, since it is larger than the sum of its proper divisors (227188214).

249025690 is a wasteful number, since it uses less digits than its factorization.

249025690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4962.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 249025690 is about 15780.5478358643. The cubic root of 249025690 is about 629.1410903939.

The spelling of 249025690 in words is "two hundred forty-nine million, twenty-five thousand, six hundred ninety".