249386890 has 16 divisors (see below), whose sum is σ = 450827208. Its totient is φ = 99325696.

The previous prime is 249386869. The next prime is 249386899. The reversal of 249386890 is 98683942.

It can be written as a sum of positive squares in 4 ways, for example, as 213422881 + 35964009 = 14609^2 + 5997^2 .

It is not an unprimeable number, because it can be changed into a prime (249386899) 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, 51187 + ... + 55846.

Almost surely, 2^249386890 is an apocalyptic number.

249386890 is a deficient number, since it is larger than the sum of its proper divisors (201440318).

249386890 is a wasteful number, since it uses less digits than its factorization.

249386890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107273.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 249386890 is about 15791.9881585569. The cubic root of 249386890 is about 629.4451232570.

The spelling of 249386890 in words is "two hundred forty-nine million, three hundred eighty-six thousand, eight hundred ninety".