85428278 has 8 divisors (see below), whose sum is σ = 137999568. Its totient is φ = 39428424.

The previous prime is 85428271. The next prime is 85428289. The reversal of 85428278 is 87282458.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85428271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642826 + ... + 1642877.

It is an arithmetic number, because the mean of its divisors is an integer number (17249946).

Almost surely, 2^85428278 is an apocalyptic number.

85428278 is a deficient number, since it is larger than the sum of its proper divisors (52571290).

85428278 is a wasteful number, since it uses less digits than its factorization.

85428278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285718.

The product of its digits is 286720, while the sum is 44.

The square root of 85428278 is about 9242.7419091956. The cubic root of 85428278 is about 440.4201874482.

The spelling of 85428278 in words is "eighty-five million, four hundred twenty-eight thousand, two hundred seventy-eight".