249957340 has 48 divisors (see below), whose sum is σ = 543836160. Its totient is φ = 96402240.

The previous prime is 249957319. The next prime is 249957347. The reversal of 249957340 is 43759942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249957347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222019 + ... + 223141.

It is an arithmetic number, because the mean of its divisors is an integer number (11329920).

Almost surely, 2^249957340 is an apocalyptic number.

249957340 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 249957340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271918080).

249957340 is an abundant number, since it is smaller than the sum of its proper divisors (293878820).

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

249957340 is a wasteful number, since it uses less digits than its factorization.

249957340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 249957340 is about 15810.0392156376. The cubic root of 249957340 is about 629.9246907545.

The spelling of 249957340 in words is "two hundred forty-nine million, nine hundred fifty-seven thousand, three hundred forty".