52809842 has 4 divisors (see below), whose sum is σ = 79214766. Its totient is φ = 26404920.

The previous prime is 52809821. The next prime is 52809857. The reversal of 52809842 is 24890825.

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., 38056561 + 14753281 = 6169^2 + 3841^2 .

It is a junction number, because it is equal to n+sod(n) for n = 52809796 and 52809805.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13202459 + ... + 13202462.

Almost surely, 2^52809842 is an apocalyptic number.

52809842 is a deficient number, since it is larger than the sum of its proper divisors (26404924).

52809842 is a wasteful number, since it uses less digits than its factorization.

52809842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26404923.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 52809842 is about 7267.0380486138. The cubic root of 52809842 is about 375.1787994759.

The spelling of 52809842 in words is "fifty-two million, eight hundred nine thousand, eight hundred forty-two".