872787638 has 8 divisors (see below), whose sum is σ = 1309364688. Its totient is φ = 436332744.

The previous prime is 872787607. The next prime is 872787661. The reversal of 872787638 is 836787278.

872787638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×872787638² = 1523516522091238088, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9881 + ... + 42932.

It is an arithmetic number, because the mean of its divisors is an integer number (163670586).

Almost surely, 2^872787638 is an apocalyptic number.

872787638 is a deficient number, since it is larger than the sum of its proper divisors (436577050).

872787638 is a wasteful number, since it uses less digits than its factorization.

872787638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61078.

The product of its digits is 6322176, while the sum is 56.

The square root of 872787638 is about 29542.9795044440. The cubic root of 872787638 is about 955.6587974612.

The spelling of 872787638 in words is "eight hundred seventy-two million, seven hundred eighty-seven thousand, six hundred thirty-eight".