249744490 has 8 divisors (see below), whose sum is σ = 449540100. Its totient is φ = 99897792.

The previous prime is 249744479. The next prime is 249744499. The reversal of 249744490 is 94447942.

249744490 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 217946169 + 31798321 = 14763^2 + 5639^2 .

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 (249744499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12487215 + ... + 12487234.

Almost surely, 2^249744490 is an apocalyptic number.

249744490 is a deficient number, since it is larger than the sum of its proper divisors (199795610).

249744490 is a wasteful number, since it uses less digits than its factorization.

249744490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24974456.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 249744490 is about 15803.3062996324. The cubic root of 249744490 is about 629.7458368392.

The spelling of 249744490 in words is "two hundred forty-nine million, seven hundred forty-four thousand, four hundred ninety".