249828566 has 32 divisors (see below), whose sum is σ = 441116928. Its totient is φ = 105016320.

The previous prime is 249828563. The next prime is 249828569. The reversal of 249828566 is 665828942.

249828566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (249828563) and next prime (249828569).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249828563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4586 + ... + 22818.

It is an arithmetic number, because the mean of its divisors is an integer number (13784904).

Almost surely, 2^249828566 is an apocalyptic number.

249828566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

249828566 is a deficient number, since it is larger than the sum of its proper divisors (191288362).

249828566 is a wasteful number, since it uses less digits than its factorization.

249828566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18296.

The product of its digits is 1658880, while the sum is 50.

The square root of 249828566 is about 15805.9661520579. The cubic root of 249828566 is about 629.8164964837.

The spelling of 249828566 in words is "two hundred forty-nine million, eight hundred twenty-eight thousand, five hundred sixty-six".