249040635 has 16 divisors (see below), whose sum is σ = 398660640. Its totient is φ = 132756480.

The previous prime is 249040621. The next prime is 249040637. The reversal of 249040635 is 536040942.

It is not a de Polignac number, because 249040635 - 2¹⁹ = 248516347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249040596 and 249040605.

It is not an unprimeable number, because it can be changed into a prime (249040637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58251 + ... + 62379.

It is an arithmetic number, because the mean of its divisors is an integer number (24916290).

Almost surely, 2^249040635 is an apocalyptic number.

249040635 is a deficient number, since it is larger than the sum of its proper divisors (149620005).

249040635 is a wasteful number, since it uses less digits than its factorization.

249040635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8158.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 249040635 is about 15781.0213547793. The cubic root of 249040635 is about 629.1536758766.

The spelling of 249040635 in words is "two hundred forty-nine million, forty thousand, six hundred thirty-five".