891872142330 has 128 divisors (see below), whose sum is σ = 2428538112000. Its totient is φ = 207805872384.

The previous prime is 891872142283. The next prime is 891872142347. The reversal of 891872142330 is 33241278198.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 891872142330.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8744971 + ... + 8846369.

It is an arithmetic number, because the mean of its divisors is an integer number (18972954000).

Almost surely, 2^891872142330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891872142330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214269056000).

891872142330 is an abundant number, since it is smaller than the sum of its proper divisors (1536665969670).

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

891872142330 is a wasteful number, since it uses less digits than its factorization.

891872142330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102628.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 891872142330 in words is "eight hundred ninety-one billion, eight hundred seventy-two million, one hundred forty-two thousand, three hundred thirty".