52547840 has 72 divisors (see below), whose sum is σ = 128122008. Its totient is φ = 20643840.

The previous prime is 52547827. The next prime is 52547851. The reversal of 52547840 is 4874525.

It can be written as a sum of positive squares in 4 ways, for example, as 246016 + 52301824 = 496^2 + 7232^2 .

It is a super-2 number, since 2×52547840² = 5522550977331200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52547840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77744 + ... + 78416.

Almost surely, 2^52547840 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 52547840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64061004).

52547840 is an abundant number, since it is smaller than the sum of its proper divisors (75574168).

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

52547840 is an equidigital number, since it uses as much as digits as its factorization.

52547840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 52547840 is about 7248.9888950115. The cubic root of 52547840 is about 374.5573205951.

The spelling of 52547840 in words is "fifty-two million, five hundred forty-seven thousand, eight hundred forty".