872415238 has 4 divisors (see below), whose sum is σ = 1308622860. Its totient is φ = 436207618.

The previous prime is 872415211. The next prime is 872415239. The reversal of 872415238 is 832514278.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 832514278 = 2 ⋅416257139.

It is a super-2 number, since 2×872415238² = 1522216694989193288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 872415238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872415239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218103808 + ... + 218103811.

It is an arithmetic number, because the mean of its divisors is an integer number (327155715).

Almost surely, 2^872415238 is an apocalyptic number.

872415238 is a deficient number, since it is larger than the sum of its proper divisors (436207622).

872415238 is a wasteful number, since it uses less digits than its factorization.

872415238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436207621.

The product of its digits is 107520, while the sum is 40.

The square root of 872415238 is about 29536.6761501696. The cubic root of 872415238 is about 955.5228583357.

The spelling of 872415238 in words is "eight hundred seventy-two million, four hundred fifteen thousand, two hundred thirty-eight".