249628839 has 8 divisors (see below), whose sum is σ = 344315760. Its totient is φ = 160680576.

The previous prime is 249628831. The next prime is 249628871. The reversal of 249628839 is 938826942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 249628839 - 2³ = 249628831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249628791 and 249628800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249628831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434562 + ... + 1434735.

It is an arithmetic number, because the mean of its divisors is an integer number (43039470).

Almost surely, 2^249628839 is an apocalyptic number.

249628839 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

249628839 is a deficient number, since it is larger than the sum of its proper divisors (94686921).

249628839 is a wasteful number, since it uses less digits than its factorization.

249628839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869329.

The product of its digits is 1492992, while the sum is 51.

The square root of 249628839 is about 15799.6467998497. The cubic root of 249628839 is about 629.6486148334.

The spelling of 249628839 in words is "two hundred forty-nine million, six hundred twenty-eight thousand, eight hundred thirty-nine".