84326440 has 64 divisors (see below), whose sum is σ = 211844160. Its totient is φ = 29944320.

The previous prime is 84326419. The next prime is 84326447. The reversal of 84326440 is 4462348.

It is a super-2 number, since 2×84326440² = 14221896966147200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84326447) 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, 16692 + ... + 21148.

It is an arithmetic number, because the mean of its divisors is an integer number (3310065).

Almost surely, 2^84326440 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 84326440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105922080).

84326440 is an abundant number, since it is smaller than the sum of its proper divisors (127517720).

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

84326440 is a wasteful number, since it uses less digits than its factorization.

84326440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522 (or 4518 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 84326440 is about 9182.9428834116. The cubic root of 84326440 is about 438.5185021839.

Adding to 84326440 its reverse (4462348), we get a palindrome (88788788).

The spelling of 84326440 in words is "eighty-four million, three hundred twenty-six thousand, four hundred forty".