52638786 has 24 divisors (see below), whose sum is σ = 114209004. Its totient is φ = 17521920.

The previous prime is 52638779. The next prime is 52638787. The reversal of 52638786 is 68783625.

52638786 is a `hidden beast` number, since 5 + 2 + 638 + 7 + 8 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33005025 + 19633761 = 5745^2 + 4431^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52638787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15306 + ... + 18426.

Almost surely, 2^52638786 is an apocalyptic number.

52638786 is an abundant number, since it is smaller than the sum of its proper divisors (61570218).

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

52638786 is a wasteful number, since it uses less digits than its factorization.

52638786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4063 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 52638786 is about 7255.2591959213. The cubic root of 52638786 is about 374.7732816244.

The spelling of 52638786 in words is "fifty-two million, six hundred thirty-eight thousand, seven hundred eighty-six".