249998895 has 24 divisors (see below), whose sum is σ = 433716192. Its totient is φ = 133214400.

The previous prime is 249998893. The next prime is 249998951. The reversal of 249998895 is 598899942.

It is not a de Polignac number, because 249998895 - 2¹ = 249998893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249998893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76750 + ... + 79940.

It is an arithmetic number, because the mean of its divisors is an integer number (18071508).

Almost surely, 2^249998895 is an apocalyptic number.

249998895 is a deficient number, since it is larger than the sum of its proper divisors (183717297).

249998895 is a wasteful number, since it uses less digits than its factorization.

249998895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943 (or 4940 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The square root of 249998895 is about 15811.3533576351. The cubic root of 249998895 is about 629.9595968042.

The spelling of 249998895 in words is "two hundred forty-nine million, nine hundred ninety-eight thousand, eight hundred ninety-five".