249904806 has 16 divisors (see below), whose sum is σ = 506850048. Its totient is φ = 82128200.

The previous prime is 249904801. The next prime is 249904807. The reversal of 249904806 is 608409942.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249904801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292890 + ... + 293741.

It is an arithmetic number, because the mean of its divisors is an integer number (31678128).

Almost surely, 2^249904806 is an apocalyptic number.

249904806 is an abundant number, since it is smaller than the sum of its proper divisors (256945242).

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

249904806 is a wasteful number, since it uses less digits than its factorization.

249904806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586707.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 249904806 is about 15808.3777156291. The cubic root of 249904806 is about 629.8805568470.

The spelling of 249904806 in words is "two hundred forty-nine million, nine hundred four thousand, eight hundred six".