85440605 has 4 divisors (see below), whose sum is σ = 102528732. Its totient is φ = 68352480.

The previous prime is 85440601. The next prime is 85440661. The reversal of 85440605 is 50604458.

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

It can be written as a sum of positive squares in 2 ways, for example, as 49308484 + 36132121 = 7022^2 + 6011^2 .

It is not a de Polignac number, because 85440605 - 2² = 85440601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85440601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8544056 + ... + 8544065.

It is an arithmetic number, because the mean of its divisors is an integer number (25632183).

Almost surely, 2^85440605 is an apocalyptic number.

It is an amenable number.

85440605 is a deficient number, since it is larger than the sum of its proper divisors (17088127).

85440605 is a wasteful number, since it uses less digits than its factorization.

85440605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17088126.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 85440605 is about 9243.4087327133. The cubic root of 85440605 is about 440.4413701240.

The spelling of 85440605 in words is "eighty-five million, four hundred forty thousand, six hundred five".