85128452 has 24 divisors (see below), whose sum is σ = 159649056. Its totient is φ = 39575168.

The previous prime is 85128431. The next prime is 85128467. The reversal of 85128452 is 25482158.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898 + ... + 13185.

It is an arithmetic number, because the mean of its divisors is an integer number (6652044).

Almost surely, 2^85128452 is an apocalyptic number.

It is an amenable number.

85128452 is a deficient number, since it is larger than the sum of its proper divisors (74520604).

85128452 is a wasteful number, since it uses less digits than its factorization.

85128452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15187 (or 15185 counting only the distinct ones).

The product of its digits is 25600, while the sum is 35.

The square root of 85128452 is about 9226.5081152080. The cubic root of 85128452 is about 439.9043387077.

The spelling of 85128452 in words is "eighty-five million, one hundred twenty-eight thousand, four hundred fifty-two".