250423440 has 80 divisors (see below), whose sum is σ = 784074816. Its totient is φ = 66112000.

The previous prime is 250423417. The next prime is 250423441. The reversal of 250423440 is 44324052.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 250423440.

It is not an unprimeable number, because it can be changed into a prime (250423441) 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 15 ways as a sum of consecutive naturals, for example, 19075 + ... + 29405.

Almost surely, 2^250423440 is an apocalyptic number.

250423440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 250423440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392037408).

250423440 is an abundant number, since it is smaller than the sum of its proper divisors (533651376).

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

250423440 is a wasteful number, since it uses less digits than its factorization.

250423440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10448 (or 10442 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 250423440 is about 15824.7729841537. The cubic root of 250423440 is about 630.3159916441.

Adding to 250423440 its reverse (44324052), we get a palindrome (294747492).

It can be divided in two parts, 25042 and 3440, that added together give a palindrome (28482).

The spelling of 250423440 in words is "two hundred fifty million, four hundred twenty-three thousand, four hundred forty".