84391794 has 40 divisors (see below), whose sum is σ = 192687660. Its totient is φ = 27597024.

The previous prime is 84391781. The next prime is 84391799. The reversal of 84391794 is 49719348.

It can be written as a sum of positive squares in 2 ways, for example, as 74183769 + 10208025 = 8613^2 + 3195^2 .

It is not an unprimeable number, because it can be changed into a prime (84391799) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3672 + ... + 13500.

Almost surely, 2^84391794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84391794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96343830).

84391794 is an abundant number, since it is smaller than the sum of its proper divisors (108295866).

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

84391794 is a wasteful number, since it uses less digits than its factorization.

84391794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9896 (or 9887 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 84391794 is about 9186.5006395254. The cubic root of 84391794 is about 438.6317586260.

The spelling of 84391794 in words is "eighty-four million, three hundred ninety-one thousand, seven hundred ninety-four".