85409128 has 16 divisors (see below), whose sum is σ = 183019680. Its totient is φ = 36603888.

The previous prime is 85409119. The next prime is 85409183. The reversal of 85409128 is 82190458.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762526 + ... + 762637.

It is an arithmetic number, because the mean of its divisors is an integer number (11438730).

Almost surely, 2^85409128 is an apocalyptic number.

It is an amenable number.

85409128 is an abundant number, since it is smaller than the sum of its proper divisors (97610552).

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

85409128 is a wasteful number, since it uses less digits than its factorization.

85409128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525176 (or 1525172 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 85409128 is about 9241.7059031328. The cubic root of 85409128 is about 440.3872761099.

The spelling of 85409128 in words is "eighty-five million, four hundred nine thousand, one hundred twenty-eight".