253402450340 has 24 divisors (see below), whose sum is σ = 573079388280. Its totient is φ = 93563981568.

The previous prime is 253402450333. The next prime is 253402450417. The reversal of 253402450340 is 43054204352.

It can be written as a sum of positive squares in 4 ways, for example, as 2848143424 + 250554306916 = 53368^2 + 500554^2 .

It is a super-2 number, since 2×253402450340² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 253402450297 and 253402450306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487312145 + ... + 487312664.

It is an arithmetic number, because the mean of its divisors is an integer number (23878307845).

Almost surely, 2^253402450340 is an apocalyptic number.

253402450340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253402450340 is an abundant number, since it is smaller than the sum of its proper divisors (319676937940).

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

253402450340 is a wasteful number, since it uses less digits than its factorization.

253402450340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974624831 (or 974624829 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 32.

Adding to 253402450340 its reverse (43054204352), we get a palindrome (296456654692).

The spelling of 253402450340 in words is "two hundred fifty-three billion, four hundred two million, four hundred fifty thousand, three hundred forty".