249489980 has 12 divisors (see below), whose sum is σ = 523929000. Its totient is φ = 99795984.

The previous prime is 249489941. The next prime is 249490009. The reversal of 249489980 is 89984942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6237230 + ... + 6237269.

It is an arithmetic number, because the mean of its divisors is an integer number (43660750).

Almost surely, 2^249489980 is an apocalyptic number.

249489980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249489980 is an abundant number, since it is smaller than the sum of its proper divisors (274439020).

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

249489980 is a wasteful number, since it uses less digits than its factorization.

249489980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12474508 (or 12474506 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 249489980 is about 15795.2518181889. The cubic root of 249489980 is about 629.5318433443.

The spelling of 249489980 in words is "two hundred forty-nine million, four hundred eighty-nine thousand, nine hundred eighty".