891673388 has 6 divisors (see below), whose sum is σ = 1560428436. Its totient is φ = 445836692.

The previous prime is 891673381. The next prime is 891673403. The reversal of 891673388 is 883376198.

It is not an unprimeable number, because it can be changed into a prime (891673381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111459170 + ... + 111459177.

It is an arithmetic number, because the mean of its divisors is an integer number (260071406).

Almost surely, 2^891673388 is an apocalyptic number.

It is an amenable number.

891673388 is a deficient number, since it is larger than the sum of its proper divisors (668755048).

891673388 is a wasteful number, since it uses less digits than its factorization.

891673388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222918351 (or 222918349 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The square root of 891673388 is about 29860.9006562093. The cubic root of 891673388 is about 962.5026526716.

The spelling of 891673388 in words is "eight hundred ninety-one million, six hundred seventy-three thousand, three hundred eighty-eight".