85005590 has 16 divisors (see below), whose sum is σ = 153120240. Its totient is φ = 33977760.

The previous prime is 85005553. The next prime is 85005617. The reversal of 85005590 is 9550058.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19316 + ... + 23304.

It is an arithmetic number, because the mean of its divisors is an integer number (9570015).

Almost surely, 2^85005590 is an apocalyptic number.

85005590 is a deficient number, since it is larger than the sum of its proper divisors (68114650).

85005590 is a wasteful number, since it uses less digits than its factorization.

85005590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6127.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 85005590 is about 9219.8476126235. The cubic root of 85005590 is about 439.6926055449.

The spelling of 85005590 in words is "eighty-five million, five thousand, five hundred ninety".