85431628 has 12 divisors (see below), whose sum is σ = 149578632. Its totient is φ = 42694880.

The previous prime is 85431623. The next prime is 85431649. The reversal of 85431628 is 82613458.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (85431623) 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 3 ways as a sum of consecutive naturals, for example, 7263 + ... + 14953.

It is an arithmetic number, because the mean of its divisors is an integer number (12464886).

Almost surely, 2^85431628 is an apocalyptic number.

It is an amenable number.

85431628 is a deficient number, since it is larger than the sum of its proper divisors (64147004).

85431628 is a wasteful number, since it uses less digits than its factorization.

85431628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10472 (or 10470 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 85431628 is about 9242.9231306984. The cubic root of 85431628 is about 440.4259442787.

The spelling of 85431628 in words is "eighty-five million, four hundred thirty-one thousand, six hundred twenty-eight".