249693740 has 24 divisors (see below), whose sum is σ = 532955472. Its totient is φ = 98239680.

The previous prime is 249693737. The next prime is 249693761. The reversal of 249693740 is 47396942.

It is a junction number, because it is equal to n+sod(n) for n = 249693691 and 249693700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101114 + ... + 103553.

It is an arithmetic number, because the mean of its divisors is an integer number (22206478).

Almost surely, 2^249693740 is an apocalyptic number.

249693740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249693740 is an abundant number, since it is smaller than the sum of its proper divisors (283261732).

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

249693740 is a wasteful number, since it uses less digits than its factorization.

249693740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204737 (or 204735 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 249693740 is about 15801.7005413974. The cubic root of 249693740 is about 629.7031775514.

The spelling of 249693740 in words is "two hundred forty-nine million, six hundred ninety-three thousand, seven hundred forty".