52128578 has 4 divisors (see below), whose sum is σ = 78192870. Its totient is φ = 26064288.

The previous prime is 52128563. The next prime is 52128623. The reversal of 52128578 is 87582125.

It is a happy number.

52128578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28440889 + 23687689 = 5333^2 + 4867^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13032143 + ... + 13032146.

Almost surely, 2^52128578 is an apocalyptic number.

52128578 is a deficient number, since it is larger than the sum of its proper divisors (26064292).

52128578 is a wasteful number, since it uses less digits than its factorization.

52128578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26064291.

The product of its digits is 44800, while the sum is 38.

The square root of 52128578 is about 7220.0123268593. The cubic root of 52128578 is about 373.5585027358.

The spelling of 52128578 in words is "fifty-two million, one hundred twenty-eight thousand, five hundred seventy-eight".