85211390 has 32 divisors (see below), whose sum is σ = 176135040. Its totient is φ = 29354400.

The previous prime is 85211383. The next prime is 85211393. The reversal of 85211390 is 9311258.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85211393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18296 + ... + 22475.

It is an arithmetic number, because the mean of its divisors is an integer number (5504220).

Almost surely, 2^85211390 is an apocalyptic number.

85211390 is an abundant number, since it is smaller than the sum of its proper divisors (90923650).

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

85211390 is a wasteful number, since it uses less digits than its factorization.

85211390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40808.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 85211390 is about 9231.0015707939. The cubic root of 85211390 is about 440.0471540373.

Subtracting from 85211390 its sum of digits (29), we obtain a square (85211361 = 9231²).

The spelling of 85211390 in words is "eighty-five million, two hundred eleven thousand, three hundred ninety".