85421028 has 96 divisors (see below), whose sum is σ = 250306560. Its totient is φ = 22026240.

The previous prime is 85421009. The next prime is 85421033. The reversal of 85421028 is 82012458.

It is a junction number, because it is equal to n+sod(n) for n = 85420986 and 85421004.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178093 + ... + 178571.

It is an arithmetic number, because the mean of its divisors is an integer number (2607360).

Almost surely, 2^85421028 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 85421028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125153280).

85421028 is an abundant number, since it is smaller than the sum of its proper divisors (164885532).

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

85421028 is a wasteful number, since it uses less digits than its factorization.

85421028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 85421028 is about 9242.3497012394. The cubic root of 85421028 is about 440.4077281207.

The spelling of 85421028 in words is "eighty-five million, four hundred twenty-one thousand, twenty-eight".