253340340 has 96 divisors (see below), whose sum is σ = 790401024. Its totient is φ = 60101760.

The previous prime is 253340323. The next prime is 253340363. The reversal of 253340340 is 43043352.

It is a self number, because there is not a number n which added to its sum of digits gives 253340340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26937 + ... + 35103.

It is an arithmetic number, because the mean of its divisors is an integer number (8233344).

Almost surely, 2^253340340 is an apocalyptic number.

253340340 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 253340340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (395200512).

253340340 is an abundant number, since it is smaller than the sum of its proper divisors (537060684).

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

253340340 is a wasteful number, since it uses less digits than its factorization.

253340340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8237 (or 8235 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 24.

The square root of 253340340 is about 15916.6686212913. The cubic root of 253340340 is about 632.7538306407.

Adding to 253340340 its reverse (43043352), we get a palindrome (296383692).

The spelling of 253340340 in words is "two hundred fifty-three million, three hundred forty thousand, three hundred forty".