249795390 has 64 divisors (see below), whose sum is σ = 647539200. Its totient is φ = 61305984.

The previous prime is 249795383. The next prime is 249795407. The reversal of 249795390 is 93597942.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 170481 + ... + 171939.

It is an arithmetic number, because the mean of its divisors is an integer number (10117800).

Almost surely, 2^249795390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249795390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323769600).

249795390 is an abundant number, since it is smaller than the sum of its proper divisors (397743810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249795390 is a wasteful number, since it uses less digits than its factorization.

249795390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921.

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 249795390 is about 15804.9166400839. The cubic root of 249795390 is about 629.7886164093.

The spelling of 249795390 in words is "two hundred forty-nine million, seven hundred ninety-five thousand, three hundred ninety".