85872278 has 4 divisors (see below), whose sum is σ = 128808420. Its totient is φ = 42936138.

The previous prime is 85872251. The next prime is 85872307. The reversal of 85872278 is 87227858.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21468068 + ... + 21468071.

It is an arithmetic number, because the mean of its divisors is an integer number (32202105).

Almost surely, 2^85872278 is an apocalyptic number.

85872278 is a deficient number, since it is larger than the sum of its proper divisors (42936142).

85872278 is a wasteful number, since it uses less digits than its factorization.

85872278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42936141.

The product of its digits is 501760, while the sum is 47.

The square root of 85872278 is about 9266.7296280835. The cubic root of 85872278 is about 441.1818742045.

The spelling of 85872278 in words is "eighty-five million, eight hundred seventy-two thousand, two hundred seventy-eight".