861589014 has 128 divisors (see below), whose sum is σ = 2163732480. Its totient is φ = 224985600.

The previous prime is 861589013. The next prime is 861589033. The reversal of 861589014 is 410985168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861589013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 770784 + ... + 771900.

It is an arithmetic number, because the mean of its divisors is an integer number (16904160).

Almost surely, 2^861589014 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861589014, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081866240).

861589014 is an abundant number, since it is smaller than the sum of its proper divisors (1302143466).

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

861589014 is a wasteful number, since it uses less digits than its factorization.

861589014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 861589014 is about 29352.8365579887. The cubic root of 861589014 is about 951.5538795216.

The spelling of 861589014 in words is "eight hundred sixty-one million, five hundred eighty-nine thousand, fourteen".