553640 has 16 divisors (see below), whose sum is σ = 1245780. Its totient is φ = 221440.

The previous prime is 553627. The next prime is 553643. The reversal of 553640 is 46355.

553640 = 83² + 84² + ... + 130².

It can be written as a sum of positive squares in 2 ways, for example, as 538756 + 14884 = 734^2 + 122^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 553640.

It is not an unprimeable number, because it can be changed into a prime (553643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6881 + ... + 6960.

2⁵⁵³⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

553640 is an abundant number, since it is smaller than the sum of its proper divisors (692140).

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

553640 is a wasteful number, since it uses less digits than its factorization.

553640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13852 (or 13848 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 553640 is about 744.0698891905. The cubic root of 553640 is about 82.1124770182.

Adding to 553640 its reverse (46355), we get a palindrome (599995).

The spelling of 553640 in words is "five hundred fifty-three thousand, six hundred forty".