52638397 has 6 divisors (see below), whose sum is σ = 61232478. Its totient is φ = 45118584.

The previous prime is 52638373. The next prime is 52638401. The reversal of 52638397 is 79383625.

It can be written as a sum of positive squares in only one way, i.e., 44876601 + 7761796 = 6699^2 + 2786^2 .

It is a de Polignac number, because none of the positive numbers 2^k-52638397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52638317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 537078 + ... + 537175.

It is an arithmetic number, because the mean of its divisors is an integer number (10205413).

Almost surely, 2^52638397 is an apocalyptic number.

It is an amenable number.

52638397 is a deficient number, since it is larger than the sum of its proper divisors (8594081).

52638397 is a wasteful number, since it uses less digits than its factorization.

52638397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074267 (or 1074260 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 52638397 is about 7255.2323877323. The cubic root of 52638397 is about 374.7723584321.

It can be divided in two parts, 52638 and 397, that added together give a palindrome (53035).

The spelling of 52638397 in words is "fifty-two million, six hundred thirty-eight thousand, three hundred ninety-seven".