891052890 has 192 divisors, whose sum is σ = 2755904256. Its totient is φ = 179536896.

The previous prime is 891052889. The next prime is 891052949. The reversal of 891052890 is 98250198.

It is a happy number.

891052890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1443862 + ... + 1444478.

It is an arithmetic number, because the mean of its divisors is an integer number (14353668).

Almost surely, 2^891052890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891052890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1377952128).

891052890 is an abundant number, since it is smaller than the sum of its proper divisors (1864851366).

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

891052890 is a wasteful number, since it uses less digits than its factorization.

891052890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 891052890 is about 29850.5090408857. The cubic root of 891052890 is about 962.2793386322.

The spelling of 891052890 in words is "eight hundred ninety-one million, fifty-two thousand, eight hundred ninety".