249894918 has 144 divisors (see below), whose sum is σ = 694014048. Its totient is φ = 63244800.

The previous prime is 249894901. The next prime is 249894923. The reversal of 249894918 is 819498942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4096608 + ... + 4096668.

It is an arithmetic number, because the mean of its divisors is an integer number (4819542).

Almost surely, 2^249894918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249894918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347007024).

249894918 is an abundant number, since it is smaller than the sum of its proper divisors (444119130).

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

249894918 is a wasteful number, since it uses less digits than its factorization.

249894918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 127 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 249894918 is about 15808.0649669718. The cubic root of 249894918 is about 629.8722492289.

The spelling of 249894918 in words is "two hundred forty-nine million, eight hundred ninety-four thousand, nine hundred eighteen".