872451938 has 8 divisors (see below), whose sum is σ = 1321635420. Its totient is φ = 431906800.

The previous prime is 872451919. The next prime is 872451947. The reversal of 872451938 is 839154278.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 870427009 + 2024929 = 29503^2 + 1423^2 .

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

It is a super-2 number, since 2×872451938² = 1522344768239911688, 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 = 872451892 and 872451901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2159333 + ... + 2159736.

Almost surely, 2^872451938 is an apocalyptic number.

872451938 is a deficient number, since it is larger than the sum of its proper divisors (449183482).

872451938 is a wasteful number, since it uses less digits than its factorization.

872451938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319172.

The product of its digits is 483840, while the sum is 47.

The square root of 872451938 is about 29537.2974051452. The cubic root of 872451938 is about 955.5362568474.

The spelling of 872451938 in words is "eight hundred seventy-two million, four hundred fifty-one thousand, nine hundred thirty-eight".