52545440 has 48 divisors (see below), whose sum is σ = 124626600. Its totient is φ = 20935680.

The previous prime is 52545421. The next prime is 52545491. The reversal of 52545440 is 4454525.

It can be written as a sum of positive squares in 4 ways, for example, as 48497296 + 4048144 = 6964^2 + 2012^2 .

It is a super-2 number, since 2×52545440² = 5522046529587200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55370 + ... + 56310.

Almost surely, 2^52545440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52545440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62313300).

52545440 is an abundant number, since it is smaller than the sum of its proper divisors (72081160).

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

52545440 is a wasteful number, since it uses less digits than its factorization.

52545440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 52545440 is about 7248.8233527932. The cubic root of 52545440 is about 374.5516181644.

Adding to 52545440 its reverse (4454525), we get a palindrome (56999965).

The spelling of 52545440 in words is "fifty-two million, five hundred forty-five thousand, four hundred forty".