249770742 has 32 divisors (see below), whose sum is σ = 543013632. Its totient is φ = 76131744.

The previous prime is 249770723. The next prime is 249770743. The reversal of 249770742 is 247077942.

It is a junction number, because it is equal to n+sod(n) for n = 249770694 and 249770703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249770743) 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, 6618 + ... + 23309.

It is an arithmetic number, because the mean of its divisors is an integer number (16969176).

Almost surely, 2^249770742 is an apocalyptic number.

249770742 is an abundant number, since it is smaller than the sum of its proper divisors (293242890).

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

249770742 is a wasteful number, since it uses less digits than its factorization.

249770742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30052.

The product of its (nonzero) digits is 197568, while the sum is 42.

The square root of 249770742 is about 15804.1368634924. The cubic root of 249770742 is about 629.7679014014.

The spelling of 249770742 in words is "two hundred forty-nine million, seven hundred seventy thousand, seven hundred forty-two".