867115644 has 24 divisors (see below), whose sum is σ = 2031337728. Its totient is φ = 287886000.

The previous prime is 867115637. The next prime is 867115693. The reversal of 867115644 is 446511768.

It is a junction number, because it is equal to n+sod(n) for n = 867115596 and 867115605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140932 + ... + 146955.

It is an arithmetic number, because the mean of its divisors is an integer number (84639072).

Almost surely, 2^867115644 is an apocalyptic number.

It is an amenable number.

867115644 is an abundant number, since it is smaller than the sum of its proper divisors (1164222084).

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

867115644 is a wasteful number, since it uses less digits than its factorization.

867115644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288145 (or 288143 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 867115644 is about 29446.8274012668. The cubic root of 867115644 is about 953.5841134741.

The spelling of 867115644 in words is "eight hundred sixty-seven million, one hundred fifteen thousand, six hundred forty-four".