249897260 has 36 divisors (see below), whose sum is σ = 539410032. Its totient is φ = 97246656.

The previous prime is 249897257. The next prime is 249897281. The reversal of 249897260 is 62798942.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 22817 + ... + 31943.

It is an arithmetic number, because the mean of its divisors is an integer number (14983612).

Almost surely, 2^249897260 is an apocalyptic number.

249897260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249897260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269705016).

249897260 is an abundant number, since it is smaller than the sum of its proper divisors (289512772).

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

249897260 is a wasteful number, since it uses less digits than its factorization.

249897260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9210 (or 9171 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 249897260 is about 15808.1390429108. The cubic root of 249897260 is about 629.8742169309.

The spelling of 249897260 in words is "two hundred forty-nine million, eight hundred ninety-seven thousand, two hundred sixty".