85421984 has 12 divisors (see below), whose sum is σ = 168174594. Its totient is φ = 42710976.

The previous prime is 85421981. The next prime is 85422013. The reversal of 85421984 is 48912458.

It can be written as a sum of positive squares in only one way, i.e., 83539600 + 1882384 = 9140^2 + 1372^2 .

It is not an unprimeable number, because it can be changed into a prime (85421981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334687 + ... + 1334750.

Almost surely, 2^85421984 is an apocalyptic number.

It is an amenable number.

85421984 is a deficient number, since it is larger than the sum of its proper divisors (82752610).

85421984 is a wasteful number, since it uses less digits than its factorization.

85421984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669447 (or 2669439 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 85421984 is about 9242.4014195446. The cubic root of 85421984 is about 440.4093710737.

The spelling of 85421984 in words is "eighty-five million, four hundred twenty-one thousand, nine hundred eighty-four".