85278375 has 192 divisors, whose sum is σ = 204422400. Its totient is φ = 33868800.

The previous prime is 85278359. The next prime is 85278461. The reversal of 85278375 is 57387258.

85278375 is a `hidden beast` number, since 8 + 5 + 278 + 375 = 666.

It is not a de Polignac number, because 85278375 - 2⁴ = 85278359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 85278375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5016367 + ... + 5016383.

It is an arithmetic number, because the mean of its divisors is an integer number (1064700).

Almost surely, 2^85278375 is an apocalyptic number.

85278375 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

85278375 is an abundant number, since it is smaller than the sum of its proper divisors (119144025).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85278375 is a wasteful number, since it uses less digits than its factorization.

85278375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 45 counting only the distinct ones).

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

The square root of 85278375 is about 9234.6291208689. The cubic root of 85278375 is about 440.1624314202.

The spelling of 85278375 in words is "eighty-five million, two hundred seventy-eight thousand, three hundred seventy-five".