84040686 has 64 divisors (see below), whose sum is σ = 198777600. Its totient is φ = 26244000.

The previous prime is 84040657. The next prime is 84040709. The reversal of 84040686 is 68604048.

It is a self number, because there is not a number n which added to its sum of digits gives 84040686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103221 + ... + 104031.

It is an arithmetic number, because the mean of its divisors is an integer number (3105900).

Almost surely, 2^84040686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84040686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99388800).

84040686 is an abundant number, since it is smaller than the sum of its proper divisors (114736914).

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

84040686 is a wasteful number, since it uses less digits than its factorization.

84040686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 84040686 is about 9167.3707244771. The cubic root of 84040686 is about 438.0226109551.

The spelling of 84040686 in words is "eighty-four million, forty thousand, six hundred eighty-six".