53534440 has 16 divisors (see below), whose sum is σ = 120452580. Its totient is φ = 21413760.

The previous prime is 53534423. The next prime is 53534447. The reversal of 53534440 is 4443535.

It can be written as a sum of positive squares in 2 ways, for example, as 49364676 + 4169764 = 7026^2 + 2042^2 .

It is a super-2 number, since 2×53534440² = 5731872532227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53534399 and 53534408.

It is not an unprimeable number, because it can be changed into a prime (53534447) 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, 669141 + ... + 669220.

Almost surely, 2^53534440 is an apocalyptic number.

It is an amenable number.

53534440 is an abundant number, since it is smaller than the sum of its proper divisors (66918140).

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

53534440 is a wasteful number, since it uses less digits than its factorization.

53534440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338372 (or 1338368 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 28.

The square root of 53534440 is about 7316.7233103350. The cubic root of 53534440 is about 376.8869396681.

Adding to 53534440 its reverse (4443535), we get a palindrome (57977975).

The spelling of 53534440 in words is "fifty-three million, five hundred thirty-four thousand, four hundred forty".