249913636 has 12 divisors (see below), whose sum is σ = 499827328. Its totient is φ = 107105832.

The previous prime is 249913597. The next prime is 249913637. The reversal of 249913636 is 636319942.

249913636 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 249913592 and 249913601.

It is not an unprimeable number, because it can be changed into a prime (249913637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4462716 + ... + 4462771.

Almost surely, 2^249913636 is an apocalyptic number.

It is an amenable number.

249913636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

249913636 is a wasteful number, since it uses less digits than its factorization.

249913636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8925498 (or 8925496 counting only the distinct ones).

The product of its digits is 209952, while the sum is 43.

The square root of 249913636 is about 15808.6569954566. The cubic root of 249913636 is about 629.8879753782.

The spelling of 249913636 in words is "two hundred forty-nine million, nine hundred thirteen thousand, six hundred thirty-six".