249989772 has 12 divisors (see below), whose sum is σ = 583309496. Its totient is φ = 83329920.

The previous prime is 249989767. The next prime is 249989819. The reversal of 249989772 is 277989942.

249989772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×249989772² = 124989772209223968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10416229 + ... + 10416252.

Almost surely, 2^249989772 is an apocalyptic number.

It is an amenable number.

249989772 is an abundant number, since it is smaller than the sum of its proper divisors (333319724).

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

249989772 is a wasteful number, since it uses less digits than its factorization.

249989772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20832488 (or 20832486 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 57.

The square root of 249989772 is about 15811.0648597746. The cubic root of 249989772 is about 629.9519338486.

The spelling of 249989772 in words is "two hundred forty-nine million, nine hundred eighty-nine thousand, seven hundred seventy-two".