249871470 has 128 divisors (see below), whose sum is σ = 663552000. Its totient is φ = 59978880.

The previous prime is 249871469. The next prime is 249871483. The reversal of 249871470 is 74178942.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1395841 + ... + 1396019.

It is an arithmetic number, because the mean of its divisors is an integer number (5184000).

Almost surely, 2^249871470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249871470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331776000).

249871470 is an abundant number, since it is smaller than the sum of its proper divisors (413680530).

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

249871470 is a wasteful number, since it uses less digits than its factorization.

249871470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 249871470 is about 15807.3233028239. The cubic root of 249871470 is about 629.8525480059.

The spelling of 249871470 in words is "two hundred forty-nine million, eight hundred seventy-one thousand, four hundred seventy".