249945288 has 32 divisors (see below), whose sum is σ = 661620960. Its totient is φ = 78414080.

The previous prime is 249945257. The next prime is 249945379. The reversal of 249945288 is 882549942.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 249945288.

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, 305898 + ... + 306713.

It is an arithmetic number, because the mean of its divisors is an integer number (20675655).

Almost surely, 2^249945288 is an apocalyptic number.

It is an amenable number.

249945288 is an abundant number, since it is smaller than the sum of its proper divisors (411675672).

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

249945288 is a wasteful number, since it uses less digits than its factorization.

249945288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612637 (or 612633 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 249945288 is about 15809.6580608184. The cubic root of 249945288 is about 629.9145663943.

The spelling of 249945288 in words is "two hundred forty-nine million, nine hundred forty-five thousand, two hundred eighty-eight".