249968670 has 128 divisors (see below), whose sum is σ = 718626816. Its totient is φ = 54452736.

The previous prime is 249968659. The next prime is 249968683. The reversal of 249968670 is 76869942.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 411507 + ... + 412113.

It is an arithmetic number, because the mean of its divisors is an integer number (5614272).

Almost surely, 2^249968670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249968670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359313408).

249968670 is an abundant number, since it is smaller than the sum of its proper divisors (468658146).

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

249968670 is a wasteful number, since it uses less digits than its factorization.

249968670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 249968670 is about 15810.3975282091. The cubic root of 249968670 is about 629.9342082971.

The spelling of 249968670 in words is "two hundred forty-nine million, nine hundred sixty-eight thousand, six hundred seventy".