249113778 has 8 divisors (see below), whose sum is σ = 498227568. Its totient is φ = 83037924.

The previous prime is 249113743. The next prime is 249113779. The reversal of 249113778 is 877311942.

It is a sphenic number, since it is the product of 3 distinct primes.

249113778 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (249113779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20759476 + ... + 20759487.

It is an arithmetic number, because the mean of its divisors is an integer number (62278446).

Almost surely, 2^249113778 is an apocalyptic number.

249113778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

249113778 is a wasteful number, since it uses less digits than its factorization.

249113778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41518968.

The product of its digits is 84672, while the sum is 42.

The square root of 249113778 is about 15783.3386202033. The cubic root of 249113778 is about 629.2152637949.

The spelling of 249113778 in words is "two hundred forty-nine million, one hundred thirteen thousand, seven hundred seventy-eight".