249909426 has 36 divisors (see below), whose sum is σ = 586333098. Its totient is φ = 76894272.

The previous prime is 249909409. The next prime is 249909461. The reversal of 249909426 is 624909942.

It is a happy number.

249909426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 84658401 + 165251025 = 9201^2 + 12855^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 38035 + ... + 44118.

Almost surely, 2^249909426 is an apocalyptic number.

249909426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

249909426 is an abundant number, since it is smaller than the sum of its proper divisors (336423672).

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

249909426 is a wasteful number, since it uses less digits than its factorization.

249909426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82187 (or 82171 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 249909426 is about 15808.5238400048. The cubic root of 249909426 is about 629.8844383653.

The spelling of 249909426 in words is "two hundred forty-nine million, nine hundred nine thousand, four hundred twenty-six".