84385428 has 48 divisors (see below), whose sum is σ = 201976320. Its totient is φ = 27412704.

The previous prime is 84385409. The next prime is 84385429. The reversal of 84385428 is 82458348.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 84385428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84385429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82303 + ... + 83321.

It is an arithmetic number, because the mean of its divisors is an integer number (4207840).

Almost surely, 2^84385428 is an apocalyptic number.

It is an amenable number.

84385428 is an abundant number, since it is smaller than the sum of its proper divisors (117590892).

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

84385428 is a wasteful number, since it uses less digits than its factorization.

84385428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196 (or 1194 counting only the distinct ones).

The product of its digits is 245760, while the sum is 42.

The square root of 84385428 is about 9186.1541463226. The cubic root of 84385428 is about 438.6207291176.

The spelling of 84385428 in words is "eighty-four million, three hundred eighty-five thousand, four hundred twenty-eight".