249979144 has 32 divisors (see below), whose sum is σ = 477482400. Its totient is φ = 122664960.

The previous prime is 249979139. The next prime is 249979153. The reversal of 249979144 is 441979942.

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, 176712 + ... + 178120.

It is an arithmetic number, because the mean of its divisors is an integer number (14921325).

Almost surely, 2^249979144 is an apocalyptic number.

It is an amenable number.

249979144 is a deficient number, since it is larger than the sum of its proper divisors (227503256).

249979144 is a wasteful number, since it uses less digits than its factorization.

249979144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813 (or 1809 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The square root of 249979144 is about 15810.7287624575. The cubic root of 249979144 is about 629.9430065180.

The spelling of 249979144 in words is "two hundred forty-nine million, nine hundred seventy-nine thousand, one hundred forty-four".