85428249 has 8 divisors (see below), whose sum is σ = 113948640. Its totient is φ = 56930016.

The previous prime is 85428241. The next prime is 85428257. The reversal of 85428249 is 94282458.

It is an interprime number because it is at equal distance from previous prime (85428241) and next prime (85428257).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85428249 - 2³ = 85428241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85428249.

It is not an unprimeable number, because it can be changed into a prime (85428241) by changing a digit.

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, 8662 + ... + 15680.

It is an arithmetic number, because the mean of its divisors is an integer number (14243580).

Almost surely, 2^85428249 is an apocalyptic number.

It is an amenable number.

85428249 is a deficient number, since it is larger than the sum of its proper divisors (28520391).

85428249 is a wasteful number, since it uses less digits than its factorization.

85428249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11079.

The product of its digits is 184320, while the sum is 42.

The square root of 85428249 is about 9242.7403403969. The cubic root of 85428249 is about 440.4201376123.

The spelling of 85428249 in words is "eighty-five million, four hundred twenty-eight thousand, two hundred forty-nine".