84371040 has 144 divisors (see below), whose sum is σ = 310132368. Its totient is φ = 20763648.

The previous prime is 84371033. The next prime is 84371041. The reversal of 84371040 is 4017348.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 84370995 and 84371013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84371041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16467 + ... + 20973.

It is an arithmetic number, because the mean of its divisors is an integer number (2153697).

Almost surely, 2^84371040 is an apocalyptic number.

84371040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84371040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155066184).

84371040 is an abundant number, since it is smaller than the sum of its proper divisors (225761328).

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

84371040 is a wasteful number, since it uses less digits than its factorization.

84371040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541 (or 4530 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 84371040 is about 9185.3709778103. The cubic root of 84371040 is about 438.5957989296.

Adding to 84371040 its reverse (4017348), we get a palindrome (88388388).

The spelling of 84371040 in words is "eighty-four million, three hundred seventy-one thousand, forty".