85204040 has 16 divisors (see below), whose sum is σ = 191709180. Its totient is φ = 34081600.

The previous prime is 85204033. The next prime is 85204111. The reversal of 85204040 is 4040258.

It can be written as a sum of positive squares in 2 ways, for example, as 84309124 + 894916 = 9182^2 + 946^2 .

It is a junction number, because it is equal to n+sod(n) for n = 85203997 and 85204015.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065011 + ... + 1065090.

Almost surely, 2^85204040 is an apocalyptic number.

It is an amenable number.

85204040 is an abundant number, since it is smaller than the sum of its proper divisors (106505140).

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

85204040 is a wasteful number, since it uses less digits than its factorization.

85204040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130112 (or 2130108 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 85204040 is about 9230.6034472292. The cubic root of 85204040 is about 440.0345014268.

Adding to 85204040 its reverse (4040258), we get a palindrome (89244298).

The spelling of 85204040 in words is "eighty-five million, two hundred four thousand, forty".