85287290 has 32 divisors (see below), whose sum is σ = 168194880. Its totient is φ = 30880000.

The previous prime is 85287277. The next prime is 85287299. The reversal of 85287290 is 9278258.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (85287299) 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 in 15 ways as a sum of consecutive naturals, for example, 26066 + ... + 29154.

It is an arithmetic number, because the mean of its divisors is an integer number (5256090).

Almost surely, 2^85287290 is an apocalyptic number.

85287290 is a deficient number, since it is larger than the sum of its proper divisors (82907590).

85287290 is a wasteful number, since it uses less digits than its factorization.

85287290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 85287290 is about 9235.1118022469. Note that the first 3 decimals coincide. The cubic root of 85287290 is about 440.1777690770.

The spelling of 85287290 in words is "eighty-five million, two hundred eighty-seven thousand, two hundred ninety".