852555638 has 16 divisors (see below), whose sum is σ = 1395947520. Its totient is φ = 387287400.

The previous prime is 852555623. The next prime is 852555643. The reversal of 852555638 is 836555258.

It is a super-2 number, since 2×852555638² = 1453702231771174088, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 852555592 and 852555601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27683 + ... + 49713.

It is an arithmetic number, because the mean of its divisors is an integer number (87246720).

Almost surely, 2^852555638 is an apocalyptic number.

852555638 is a deficient number, since it is larger than the sum of its proper divisors (543391882).

852555638 is a wasteful number, since it uses less digits than its factorization.

852555638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23803.

The product of its digits is 1440000, while the sum is 47.

The square root of 852555638 is about 29198.5554094719. Note that the first 3 decimals coincide. The cubic root of 852555638 is about 948.2166499390.

The spelling of 852555638 in words is "eight hundred fifty-two million, five hundred fifty-five thousand, six hundred thirty-eight".