861081048 has 96 divisors (see below), whose sum is σ = 2416901760. Its totient is φ = 276664320.

The previous prime is 861081047. The next prime is 861081071. The reversal of 861081048 is 840180168.

861081048 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 (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861081041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 706936 + ... + 708152.

It is an arithmetic number, because the mean of its divisors is an integer number (25176060).

Almost surely, 2^861081048 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 861081048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208450880).

861081048 is an abundant number, since it is smaller than the sum of its proper divisors (1555820712).

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

861081048 is a wasteful number, since it uses less digits than its factorization.

861081048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577 (or 1570 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 861081048 is about 29344.1825239689. The cubic root of 861081048 is about 951.3668406001.

The spelling of 861081048 in words is "eight hundred sixty-one million, eighty-one thousand, forty-eight".