249987490 has 8 divisors (see below), whose sum is σ = 449977500. Its totient is φ = 99994992.

The previous prime is 249987481. The next prime is 249987497. The reversal of 249987490 is 94789942.

It is a happy number.

249987490 is digitally balanced in base 3, 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 211906249 + 38081241 = 14557^2 + 6171^2 .

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

It is not an unprimeable number, because it can be changed into a prime (249987497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12499365 + ... + 12499384.

Almost surely, 2^249987490 is an apocalyptic number.

249987490 is a deficient number, since it is larger than the sum of its proper divisors (199990010).

249987490 is a wasteful number, since it uses less digits than its factorization.

249987490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24998756.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 249987490 is about 15810.9926949575. The cubic root of 249987490 is about 629.9500170306.

The spelling of 249987490 in words is "two hundred forty-nine million, nine hundred eighty-seven thousand, four hundred ninety".