84438321 has 8 divisors (see below), whose sum is σ = 122819424. Its totient is φ = 51174720.

The previous prime is 84438317. The next prime is 84438331. The reversal of 84438321 is 12383448.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84438321 - 2² = 84438317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2558737 = 84438321 / (8 + 4 + 4 + 3 + 8 + 3 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (84438331) 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 7 ways as a sum of consecutive naturals, for example, 1279336 + ... + 1279401.

It is an arithmetic number, because the mean of its divisors is an integer number (15352428).

Almost surely, 2^84438321 is an apocalyptic number.

It is an amenable number.

84438321 is a deficient number, since it is larger than the sum of its proper divisors (38381103).

84438321 is a wasteful number, since it uses less digits than its factorization.

84438321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558751.

The product of its digits is 18432, while the sum is 33.

The square root of 84438321 is about 9189.0326476730. The cubic root of 84438321 is about 438.7123528383.

The spelling of 84438321 in words is "eighty-four million, four hundred thirty-eight thousand, three hundred twenty-one".