891238068 has 54 divisors (see below), whose sum is σ = 2620669506. Its totient is φ = 254638944.

The previous prime is 891238043. The next prime is 891238097. The reversal of 891238068 is 860832198.

It can be written as a sum of positive squares in only one way, i.e., 571114404 + 320123664 = 23898^2 + 17892^2 .

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 17 ways as a sum of consecutive naturals, for example, 250855 + ... + 254382.

Almost surely, 2^891238068 is an apocalyptic number.

It is an amenable number.

891238068 is an abundant number, since it is smaller than the sum of its proper divisors (1729431438).

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

891238068 is a wasteful number, since it uses less digits than its factorization.

891238068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505261 (or 505249 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 891238068 is about 29853.6106359013. The cubic root of 891238068 is about 962.3459940922.

The spelling of 891238068 in words is "eight hundred ninety-one million, two hundred thirty-eight thousand, sixty-eight".