249930 has 24 divisors (see below), whose sum is σ = 650052. Its totient is φ = 66624.

The previous prime is 249923. The next prime is 249943. The reversal of 249930 is 39942.

It can be written as a sum of positive squares in 2 ways, for example, as 233289 + 16641 = 483^2 + 129^2 .

It is a junction number, because it is equal to n+sod(n) for n = 249894 and 249903.

It is an unprimeable number.

249930 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1299 + ... + 1478.

2²⁴⁹⁹³⁰ is an apocalyptic number.

249930 is an abundant number, since it is smaller than the sum of its proper divisors (400122).

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

249930 is a wasteful number, since it uses less digits than its factorization.

249930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790 (or 2787 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 249930 is about 499.9299950993. The cubic root of 249930 is about 62.9901723143.

The spelling of 249930 in words is "two hundred forty-nine thousand, nine hundred thirty".