84128379 has 8 divisors (see below), whose sum is σ = 112358400. Its totient is φ = 55991976.

The previous prime is 84128353. The next prime is 84128381. The reversal of 84128379 is 97382148.

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

It is not a de Polignac number, because 84128379 - 2⁵ = 84128347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84128379.

It is not an unprimeable number, because it can be changed into a prime (84128329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21279 + ... + 24920.

It is an arithmetic number, because the mean of its divisors is an integer number (14044800).

Almost surely, 2^84128379 is an apocalyptic number.

84128379 is a deficient number, since it is larger than the sum of its proper divisors (28230021).

84128379 is a wasteful number, since it uses less digits than its factorization.

84128379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46809.

The product of its digits is 96768, while the sum is 42.

The square root of 84128379 is about 9172.1523646307. The cubic root of 84128379 is about 438.1749108553.

The spelling of 84128379 in words is "eighty-four million, one hundred twenty-eight thousand, three hundred seventy-nine".