872378645 has 8 divisors (see below), whose sum is σ = 1056119256. Its totient is φ = 691726336.

The previous prime is 872378587. The next prime is 872378669. The reversal of 872378645 is 546873278.

It can be written as a sum of positive squares in 4 ways, for example, as 48344209 + 824034436 = 6953^2 + 28706^2 .

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

It is not a de Polignac number, because 872378645 - 2¹⁰ = 872377621 is a prime.

It is a super-2 number, since 2×872378645² = 1522089000504072050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 872378593 and 872378602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 771452 + ... + 772581.

It is an arithmetic number, because the mean of its divisors is an integer number (132014907).

Almost surely, 2^872378645 is an apocalyptic number.

It is an amenable number.

872378645 is a deficient number, since it is larger than the sum of its proper divisors (183740611).

872378645 is a wasteful number, since it uses less digits than its factorization.

872378645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544151.

The product of its digits is 2257920, while the sum is 50.

The square root of 872378645 is about 29536.0566934721. The cubic root of 872378645 is about 955.5094985138.

It can be divided in two parts, 87 and 2378645, that added together give a palindrome (2378732).

The spelling of 872378645 in words is "eight hundred seventy-two million, three hundred seventy-eight thousand, six hundred forty-five".