249479574 has 48 divisors (see below), whose sum is σ = 528437952. Its totient is φ = 78502864.

The previous prime is 249479561. The next prime is 249479579. The reversal of 249479574 is 475974942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249479579) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262969 + ... + 263915.

It is an arithmetic number, because the mean of its divisors is an integer number (11009124).

Almost surely, 2^249479574 is an apocalyptic number.

249479574 is an abundant number, since it is smaller than the sum of its proper divisors (278958378).

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

249479574 is a wasteful number, since it uses less digits than its factorization.

249479574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081 (or 1058 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The square root of 249479574 is about 15794.9224119652. The cubic root of 249479574 is about 629.5230908225.

The spelling of 249479574 in words is "two hundred forty-nine million, four hundred seventy-nine thousand, five hundred seventy-four".