249951996 has 36 divisors (see below), whose sum is σ = 722084272. Its totient is φ = 71414784.

The previous prime is 249951941. The next prime is 249951997. The reversal of 249951996 is 699159942.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249951997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 495685 + ... + 496188.

Almost surely, 2^249951996 is an apocalyptic number.

It is an amenable number.

249951996 is an abundant number, since it is smaller than the sum of its proper divisors (472132276).

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

249951996 is a wasteful number, since it uses less digits than its factorization.

249951996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991890 (or 991885 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The square root of 249951996 is about 15809.8702081959. The cubic root of 249951996 is about 629.9202015330.

The spelling of 249951996 in words is "two hundred forty-nine million, nine hundred fifty-one thousand, nine hundred ninety-six".