249742808 has 72 divisors (see below), whose sum is σ = 559802700. Its totient is φ = 104146560.

The previous prime is 249742799. The next prime is 249742813. The reversal of 249742808 is 808247942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 658763 + ... + 659141.

Almost surely, 2^249742808 is an apocalyptic number.

249742808 is a gapful number since it is divisible by the number (28) 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 249742808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279901350).

249742808 is an abundant number, since it is smaller than the sum of its proper divisors (310059892).

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

249742808 is a wasteful number, since it uses less digits than its factorization.

249742808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 249742808 is about 15803.2530828308. The cubic root of 249742808 is about 629.7444230811.

The spelling of 249742808 in words is "two hundred forty-nine million, seven hundred forty-two thousand, eight hundred eight".