249425988 has 48 divisors (see below), whose sum is σ = 671376384. Its totient is φ = 70596000.

The previous prime is 249425963. The next prime is 249425999. The reversal of 249425988 is 889524942.

It is a super-2 number, since 2×249425988² = 124426646979552288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 249425988.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4888 + ... + 22863.

It is an arithmetic number, because the mean of its divisors is an integer number (13987008).

Almost surely, 2^249425988 is an apocalyptic number.

249425988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

249425988 is an abundant number, since it is smaller than the sum of its proper divisors (421950396).

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

249425988 is a wasteful number, since it uses less digits than its factorization.

249425988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27872 (or 27870 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 249425988 is about 15793.2260162387. The cubic root of 249425988 is about 629.4780156028.

It can be divided in two parts, 2494 and 25988, that added together give a palindrome (28482).

The spelling of 249425988 in words is "two hundred forty-nine million, four hundred twenty-five thousand, nine hundred eighty-eight".