52378569 has 20 divisors (see below), whose sum is σ = 80363844. Its totient is φ = 33973344.

The previous prime is 52378559. The next prime is 52378589. The reversal of 52378569 is 96587325.

It is a happy number.

52378569 is a `hidden beast` number, since 52 + 37 + 8 + 569 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25130169 + 27248400 = 5013^2 + 5220^2 .

It is not a de Polignac number, because 52378569 - 2⁵ = 52378537 is a prime.

It is a super-2 number, since 2×52378569² = 5487028980975522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52378559) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5742 + ... + 11735.

Almost surely, 2^52378569 is an apocalyptic number.

It is an amenable number.

52378569 is a deficient number, since it is larger than the sum of its proper divisors (27985275).

52378569 is a wasteful number, since it uses less digits than its factorization.

52378569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17526 (or 17517 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 52378569 is about 7237.3039869830. The cubic root of 52378569 is about 374.1547040309.

The spelling of 52378569 in words is "fifty-two million, three hundred seventy-eight thousand, five hundred sixty-nine".