84081340 has 48 divisors (see below), whose sum is σ = 206502912. Its totient is φ = 28155456.

The previous prime is 84081323. The next prime is 84081341. The reversal of 84081340 is 4318048.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 84081299 and 84081308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84081341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 964 + ... + 13003.

It is an arithmetic number, because the mean of its divisors is an integer number (4302144).

Almost surely, 2^84081340 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 84081340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103251456).

84081340 is an abundant number, since it is smaller than the sum of its proper divisors (122421572).

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

84081340 is a wasteful number, since it uses less digits than its factorization.

84081340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14026 (or 14024 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 84081340 is about 9169.5877769941. The cubic root of 84081340 is about 438.0932295307.

Adding to 84081340 its reverse (4318048), we get a palindrome (88399388).

The spelling of 84081340 in words is "eighty-four million, eighty-one thousand, three hundred forty".