872015838 has 16 divisors (see below), whose sum is σ = 1762012560. Its totient is φ = 287675136.

The previous prime is 872015831. The next prime is 872015857. The reversal of 872015838 is 838510278.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 872015838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872015831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748573 + ... + 749736.

It is an arithmetic number, because the mean of its divisors is an integer number (110125785).

Almost surely, 2^872015838 is an apocalyptic number.

872015838 is an abundant number, since it is smaller than the sum of its proper divisors (889996722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

872015838 is a wasteful number, since it uses less digits than its factorization.

872015838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498411.

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 872015838 is about 29529.9142904276. The cubic root of 872015838 is about 955.3770202582.

It can be divided in two parts, 87201 and 5838, that added together give a palindrome (93039).

The spelling of 872015838 in words is "eight hundred seventy-two million, fifteen thousand, eight hundred thirty-eight".