249998808 has 32 divisors (see below), whose sum is σ = 657892800. Its totient is φ = 78946848.

The previous prime is 249998797. The next prime is 249998809. The reversal of 249998808 is 808899942.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249998809) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 273666 + ... + 274577.

It is an arithmetic number, because the mean of its divisors is an integer number (20559150).

Almost surely, 2^249998808 is an apocalyptic number.

It is an amenable number.

249998808 is an abundant number, since it is smaller than the sum of its proper divisors (407893992).

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

249998808 is a wasteful number, since it uses less digits than its factorization.

249998808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548271 (or 548267 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 57.

The square root of 249998808 is about 15811.3506064473. The cubic root of 249998808 is about 629.9595237286.

The spelling of 249998808 in words is "two hundred forty-nine million, nine hundred ninety-eight thousand, eight hundred eight".