84312340 has 72 divisors (see below), whose sum is σ = 207416160. Its totient is φ = 28703808.

The previous prime is 84312337. The next prime is 84312353. The reversal of 84312340 is 4321348.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222271 + ... + 222649.

It is an arithmetic number, because the mean of its divisors is an integer number (2880780).

Almost surely, 2^84312340 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 84312340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103708080).

84312340 is an abundant number, since it is smaller than the sum of its proper divisors (123103820).

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

84312340 is a wasteful number, since it uses less digits than its factorization.

84312340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 84312340 is about 9182.1751235750. The cubic root of 84312340 is about 438.4940596503.

Adding to 84312340 its reverse (4321348), we get a palindrome (88633688).

The spelling of 84312340 in words is "eighty-four million, three hundred twelve thousand, three hundred forty".