891387888 has 160 divisors (see below), whose sum is σ = 2566502400. Its totient is φ = 265420800.

The previous prime is 891387883. The next prime is 891387941. The reversal of 891387888 is 888783198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891387883) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1158768 + ... + 1159536.

It is an arithmetic number, because the mean of its divisors is an integer number (16040640).

Almost surely, 2^891387888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891387888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1283251200).

891387888 is an abundant number, since it is smaller than the sum of its proper divisors (1675114512).

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

891387888 is a wasteful number, since it uses less digits than its factorization.

891387888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 865 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 60.

The square root of 891387888 is about 29856.1197746794. The cubic root of 891387888 is about 962.3999155616.

The spelling of 891387888 in words is "eight hundred ninety-one million, three hundred eighty-seven thousand, eight hundred eighty-eight".