249425778 has 24 divisors (see below), whose sum is σ = 580297392. Its totient is φ = 71264424.

The previous prime is 249425747. The next prime is 249425797. The reversal of 249425778 is 877524942.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423900 + ... + 424487.

It is an arithmetic number, because the mean of its divisors is an integer number (24179058).

Almost surely, 2^249425778 is an apocalyptic number.

249425778 is an abundant number, since it is smaller than the sum of its proper divisors (330871614).

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

249425778 is a wasteful number, since it uses less digits than its factorization.

249425778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848406 (or 848399 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The square root of 249425778 is about 15793.2193678173. The cubic root of 249425778 is about 629.4778389433.

The spelling of 249425778 in words is "two hundred forty-nine million, four hundred twenty-five thousand, seven hundred seventy-eight".