249743796 has 12 divisors (see below), whose sum is σ = 582735552. Its totient is φ = 83247928.

The previous prime is 249743779. The next prime is 249743797. The reversal of 249743796 is 697347942.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249743797) 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, 10405980 + ... + 10406003.

It is an arithmetic number, because the mean of its divisors is an integer number (48561296).

Almost surely, 2^249743796 is an apocalyptic number.

It is an amenable number.

249743796 is an abundant number, since it is smaller than the sum of its proper divisors (332991756).

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

249743796 is a wasteful number, since it uses less digits than its factorization.

249743796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20811990 (or 20811988 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 51.

The square root of 249743796 is about 15803.2843421866. The cubic root of 249743796 is about 629.7452535177.

The spelling of 249743796 in words is "two hundred forty-nine million, seven hundred forty-three thousand, seven hundred ninety-six".