85824478 has 4 divisors (see below), whose sum is σ = 128736720. Its totient is φ = 42912238.

The previous prime is 85824469. The next prime is 85824481. The reversal of 85824478 is 87442858.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87442858 = 2 ⋅43721429.

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, 21456118 + ... + 21456121.

It is an arithmetic number, because the mean of its divisors is an integer number (32184180).

Almost surely, 2^85824478 is an apocalyptic number.

85824478 is a deficient number, since it is larger than the sum of its proper divisors (42912242).

85824478 is a wasteful number, since it uses less digits than its factorization.

85824478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42912241.

The product of its digits is 573440, while the sum is 46.

The square root of 85824478 is about 9264.1501499058. The cubic root of 85824478 is about 441.0999990903.

The spelling of 85824478 in words is "eighty-five million, eight hundred twenty-four thousand, four hundred seventy-eight".