85428215 has 16 divisors (see below), whose sum is σ = 105458976. Its totient is φ = 66393600.

The previous prime is 85428197. The next prime is 85428241. The reversal of 85428215 is 51282458.

It is a happy number.

It is not a de Polignac number, because 85428215 - 2¹⁶ = 85362679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56864 + ... + 58346.

It is an arithmetic number, because the mean of its divisors is an integer number (6591186).

Almost surely, 2^85428215 is an apocalyptic number.

85428215 is a deficient number, since it is larger than the sum of its proper divisors (20030761).

85428215 is a wasteful number, since it uses less digits than its factorization.

85428215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810.

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

The square root of 85428215 is about 9242.7385011153. The cubic root of 85428215 is about 440.4200791840.

The spelling of 85428215 in words is "eighty-five million, four hundred twenty-eight thousand, two hundred fifteen".