249111240 has 64 divisors (see below), whose sum is σ = 854098560. Its totient is φ = 56939520.

The previous prime is 249111227. The next prime is 249111263. The reversal of 249111240 is 42111942.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 249111240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147441 + ... + 149120.

It is an arithmetic number, because the mean of its divisors is an integer number (13345290).

Almost surely, 2^249111240 is an apocalyptic number.

249111240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249111240 is an abundant number, since it is smaller than the sum of its proper divisors (604987320).

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

249111240 is a wasteful number, since it uses less digits than its factorization.

249111240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296582 (or 296578 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 249111240 is about 15783.2582187583. The cubic root of 249111240 is about 629.2131269484.

It can be divided in two parts, 2491 and 11240, that added together give a palindrome (13731).

The spelling of 249111240 in words is "two hundred forty-nine million, one hundred eleven thousand, two hundred forty".