891622672 has 10 divisors (see below), whose sum is σ = 1727518958. Its totient is φ = 445811328.

The previous prime is 891622663. The next prime is 891622679. The reversal of 891622672 is 276226198.

It can be written as a sum of positive squares in only one way, i.e., 470716416 + 420906256 = 21696^2 + 20516^2 .

It is not an unprimeable number, because it can be changed into a prime (891622679) by changing a digit.

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 as a sum of consecutive naturals, namely, 27863193 + ... + 27863224.

Almost surely, 2^891622672 is an apocalyptic number.

It is an amenable number.

891622672 is a deficient number, since it is larger than the sum of its proper divisors (835896286).

891622672 is a wasteful number, since it uses less digits than its factorization.

891622672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55726425 (or 55726419 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 891622672 is about 29860.0514400093. The cubic root of 891622672 is about 962.4844041325.

The spelling of 891622672 in words is "eight hundred ninety-one million, six hundred twenty-two thousand, six hundred seventy-two".