84323840 has 40 divisors (see below), whose sum is σ = 202185720. Its totient is φ = 33728512.

The previous prime is 84323831. The next prime is 84323867. The reversal of 84323840 is 4832348.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×84323840² = 14221019984691200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 84323797 and 84323806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13910 + ... + 19029.

It is an arithmetic number, because the mean of its divisors is an integer number (5054643).

Almost surely, 2^84323840 is an apocalyptic number.

84323840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84323840 is an abundant number, since it is smaller than the sum of its proper divisors (117861880).

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

84323840 is an equidigital number, since it uses as much as digits as its factorization.

84323840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32962 (or 32946 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 84323840 is about 9182.8013155028. The cubic root of 84323840 is about 438.5139952550.

The spelling of 84323840 in words is "eighty-four million, three hundred twenty-three thousand, eight hundred forty".