52587540 has 72 divisors (see below), whose sum is σ = 160113408. Its totient is φ = 13970880.

The previous prime is 52587539. The next prime is 52587553. The reversal of 52587540 is 4578525.

It is a happy number.

52587540 is a `hidden beast` number, since 525 + 87 + 54 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 52587495 and 52587504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83025 + ... + 83655.

Almost surely, 2^52587540 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 52587540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80056704).

52587540 is an abundant number, since it is smaller than the sum of its proper divisors (107525868).

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

52587540 is a wasteful number, since it uses less digits than its factorization.

52587540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 52587540 is about 7251.7266909337. The cubic root of 52587540 is about 374.6516231230.

The spelling of 52587540 in words is "fifty-two million, five hundred eighty-seven thousand, five hundred forty".