52455440 has 20 divisors (see below), whose sum is σ = 121959084. Its totient is φ = 20982144.

The previous prime is 52455407. The next prime is 52455449. The reversal of 52455440 is 4455425.

It can be written as a sum of positive squares in 2 ways, for example, as 5779216 + 46676224 = 2404^2 + 6832^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (52455449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327767 + ... + 327926.

Almost surely, 2^52455440 is an apocalyptic number.

It is an amenable number.

52455440 is an abundant number, since it is smaller than the sum of its proper divisors (69503644).

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

52455440 is a wasteful number, since it uses less digits than its factorization.

52455440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655706 (or 655700 counting only the distinct ones).

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

The square root of 52455440 is about 7242.6127882139. The cubic root of 52455440 is about 374.3376515483.

The spelling of 52455440 in words is "fifty-two million, four hundred fifty-five thousand, four hundred forty".