253640600 has 48 divisors (see below), whose sum is σ = 592860120. Its totient is φ = 100915200.

The previous prime is 253640581. The next prime is 253640603. The reversal of 253640600 is 6046352.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 253640600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253640603) 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 11 ways as a sum of consecutive naturals, for example, 35315 + ... + 41885.

Almost surely, 2^253640600 is an apocalyptic number.

253640600 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 253640600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296430060).

253640600 is an abundant number, since it is smaller than the sum of its proper divisors (339219520).

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

253640600 is a wasteful number, since it uses less digits than its factorization.

253640600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780 (or 6771 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 253640600 is about 15926.0980783116. The cubic root of 253640600 is about 633.0037127496.

Adding to 253640600 its reverse (6046352), we get a palindrome (259686952).

The spelling of 253640600 in words is "two hundred fifty-three million, six hundred forty thousand, six hundred".