249872736 has 48 divisors (see below), whose sum is σ = 684440064. Its totient is φ = 79668864.

The previous prime is 249872731. The next prime is 249872761. The reversal of 249872736 is 637278942.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×249872736² = 124872768392251392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249872731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54376 + ... + 58791.

It is an arithmetic number, because the mean of its divisors is an integer number (14259168).

Almost surely, 2^249872736 is an apocalyptic number.

It is an amenable number.

249872736 is an abundant number, since it is smaller than the sum of its proper divisors (434567328).

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

249872736 is a wasteful number, since it uses less digits than its factorization.

249872736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113203 (or 113195 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The square root of 249872736 is about 15807.3633475036. The cubic root of 249872736 is about 629.8536117421.

The spelling of 249872736 in words is "two hundred forty-nine million, eight hundred seventy-two thousand, seven hundred thirty-six".