85278357 has 12 divisors (see below), whose sum is σ = 127427820. Its totient is φ = 54891648.

The previous prime is 85278343. The next prime is 85278359. The reversal of 85278357 is 75387258.

It can be written as a sum of positive squares in 2 ways, for example, as 30902481 + 54375876 = 5559^2 + 7374^2 .

It is not a de Polignac number, because 85278357 - 2⁶ = 85278293 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85278359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163108 + ... + 163629.

It is an arithmetic number, because the mean of its divisors is an integer number (10618985).

Almost surely, 2^85278357 is an apocalyptic number.

85278357 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

85278357 is a deficient number, since it is larger than the sum of its proper divisors (42149463).

85278357 is a wasteful number, since it uses less digits than its factorization.

85278357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326772 (or 326769 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 85278357 is about 9234.6281462764. The cubic root of 85278357 is about 440.1624004514.

The spelling of 85278357 in words is "eighty-five million, two hundred seventy-eight thousand, three hundred fifty-seven".