249397560 has 48 divisors (see below), whose sum is σ = 810543240. Its totient is φ = 66505920.

The previous prime is 249397513. The next prime is 249397567. The reversal of 249397560 is 65793942.

It is a happy number.

249397560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249397567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346026 + ... + 346745.

Almost surely, 2^249397560 is an apocalyptic number.

249397560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249397560 is an abundant number, since it is smaller than the sum of its proper divisors (561145680).

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

249397560 is a wasteful number, since it uses less digits than its factorization.

249397560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692788 (or 692781 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 249397560 is about 15792.3259844774. The cubic root of 249397560 is about 629.4541000503.

The spelling of 249397560 in words is "two hundred forty-nine million, three hundred ninety-seven thousand, five hundred sixty".