253404436 has 24 divisors (see below), whose sum is σ = 469947240. Its totient is φ = 119347200.

The previous prime is 253404419. The next prime is 253404439. The reversal of 253404436 is 634404352.

It can be written as a sum of positive squares in 4 ways, for example, as 5152900 + 248251536 = 2270^2 + 15756^2 .

It is a junction number, because it is equal to n+sod(n) for n = 253404398 and 253404407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253404439) 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 7 ways as a sum of consecutive naturals, for example, 21885 + ... + 31396.

It is an arithmetic number, because the mean of its divisors is an integer number (19581135).

Almost surely, 2^253404436 is an apocalyptic number.

It is an amenable number.

253404436 is a deficient number, since it is larger than the sum of its proper divisors (216542804).

253404436 is a wasteful number, since it uses less digits than its factorization.

253404436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53355 (or 53353 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 31.

The square root of 253404436 is about 15918.6819806164. The cubic root of 253404436 is about 632.8071891250.

Adding to 253404436 its reverse (634404352), we get a palindrome (887808788).

The spelling of 253404436 in words is "two hundred fifty-three million, four hundred four thousand, four hundred thirty-six".