249278974 has 24 divisors (see below), whose sum is σ = 457862760. Its totient is φ = 101210256.

The previous prime is 249278971. The next prime is 249278999. The reversal of 249278974 is 479872942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249278971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65077 + ... + 68800.

It is an arithmetic number, because the mean of its divisors is an integer number (19077615).

Almost surely, 2^249278974 is an apocalyptic number.

249278974 is a deficient number, since it is larger than the sum of its proper divisors (208583786).

249278974 is a wasteful number, since it uses less digits than its factorization.

249278974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133912 (or 133905 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The square root of 249278974 is about 15788.5709929683. The cubic root of 249278974 is about 629.3543178954.

The spelling of 249278974 in words is "two hundred forty-nine million, two hundred seventy-eight thousand, nine hundred seventy-four".