85423904 has 12 divisors (see below), whose sum is σ = 168178374. Its totient is φ = 42711936.

The previous prime is 85423903. The next prime is 85423913. The reversal of 85423904 is 40932458.

It can be written as a sum of positive squares in only one way, i.e., 71436304 + 13987600 = 8452^2 + 3740^2 .

It is not an unprimeable number, because it can be changed into a prime (85423901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334717 + ... + 1334780.

Almost surely, 2^85423904 is an apocalyptic number.

It is an amenable number.

85423904 is a deficient number, since it is larger than the sum of its proper divisors (82754470).

85423904 is a wasteful number, since it uses less digits than its factorization.

85423904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2669507 (or 2669499 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 85423904 is about 9242.5052880699. The cubic root of 85423904 is about 440.4126706914.

The spelling of 85423904 in words is "eighty-five million, four hundred twenty-three thousand, nine hundred four".