249989956 has 24 divisors (see below), whose sum is σ = 455517720. Its totient is φ = 119942400.

The previous prime is 249989953. The next prime is 249989963. The reversal of 249989956 is 659989942.

It is a happy number.

249989956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7128900 + 242861056 = 2670^2 + 15584^2 .

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a junction number, because it is equal to n+sod(n) for n = 249989894 and 249989903.

It is not an unprimeable number, because it can be changed into a prime (249989951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2491 + ... + 22498.

It is an arithmetic number, because the mean of its divisors is an integer number (18979905).

Almost surely, 2^249989956 is an apocalyptic number.

It is an amenable number.

249989956 is a deficient number, since it is larger than the sum of its proper divisors (205527764).

249989956 is a wasteful number, since it uses less digits than its factorization.

249989956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25095 (or 25093 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 61.

The square root of 249989956 is about 15811.0706784835. The cubic root of 249989956 is about 629.9520884031.

The spelling of 249989956 in words is "two hundred forty-nine million, nine hundred eighty-nine thousand, nine hundred fifty-six".