53865528 has 64 divisors (see below), whose sum is σ = 140378400. Its totient is φ = 17203200.

The previous prime is 53865527. The next prime is 53865529. The reversal of 53865528 is 82556835.

It is an interprime number because it is at equal distance from previous prime (53865527) and next prime (53865529).

It is a self number, because there is not a number n which added to its sum of digits gives 53865528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53865527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134128 + ... + 134528.

Almost surely, 2^53865528 is an apocalyptic number.

53865528 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53865528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70189200).

53865528 is an abundant number, since it is smaller than the sum of its proper divisors (86512872).

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

53865528 is a wasteful number, since it uses less digits than its factorization.

53865528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632 (or 628 counting only the distinct ones).

The product of its digits is 288000, while the sum is 42.

The square root of 53865528 is about 7339.3138643881. The cubic root of 53865528 is about 377.6623058335.

It can be divided in two parts, 538 and 65528, that added together give a palindrome (66066).

The spelling of 53865528 in words is "fifty-three million, eight hundred sixty-five thousand, five hundred twenty-eight".