249840426 has 32 divisors (see below), whose sum is σ = 550123200. Its totient is φ = 75012480.

The previous prime is 249840413. The next prime is 249840431. The reversal of 249840426 is 624048942.

249840426 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×249840426² = 124840476927722952, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10171 + ... + 24558.

It is an arithmetic number, because the mean of its divisors is an integer number (17191350).

Almost surely, 2^249840426 is an apocalyptic number.

249840426 is an abundant number, since it is smaller than the sum of its proper divisors (300282774).

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

249840426 is a wasteful number, since it uses less digits than its factorization.

249840426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34854.

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 249840426 is about 15806.3413223934. The cubic root of 249840426 is about 629.8264626585.

It can be divided in two parts, 2498 and 40426, that added together give a palindrome (42924).

The spelling of 249840426 in words is "two hundred forty-nine million, eight hundred forty thousand, four hundred twenty-six".