85205290 has 16 divisors (see below), whose sum is σ = 153498240. Its totient is φ = 34053520.

The previous prime is 85205287. The next prime is 85205293. The reversal of 85205290 is 9250258.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85205287) and next prime (85205293).

It is not an unprimeable number, because it can be changed into a prime (85205293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12291 + ... + 17929.

It is an arithmetic number, because the mean of its divisors is an integer number (9593640).

Almost surely, 2^85205290 is an apocalyptic number.

85205290 is a deficient number, since it is larger than the sum of its proper divisors (68292950).

85205290 is a wasteful number, since it uses less digits than its factorization.

85205290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7157.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 85205290 is about 9230.6711565303. The cubic root of 85205290 is about 440.0366532827.

The spelling of 85205290 in words is "eighty-five million, two hundred five thousand, two hundred ninety".