249047808 has 72 divisors (see below), whose sum is σ = 670987968. Its totient is φ = 81994752.

The previous prime is 249047797. The next prime is 249047809. The reversal of 249047808 is 808740942.

It is a self number, because there is not a number n which added to its sum of digits gives 249047808.

It is not an unprimeable number, because it can be changed into a prime (249047809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61791 + ... + 65697.

Almost surely, 2^249047808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249047808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335493984).

249047808 is an abundant number, since it is smaller than the sum of its proper divisors (421940160).

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

249047808 is an equidigital number, since it uses as much as digits as its factorization.

249047808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009 (or 3995 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 249047808 is about 15781.2486198019. The cubic root of 249047808 is about 629.1597162242.

The spelling of 249047808 in words is "two hundred forty-nine million, forty-seven thousand, eight hundred eight".