85216388 has 6 divisors (see below), whose sum is σ = 149128686. Its totient is φ = 42608192.

The previous prime is 85216379. The next prime is 85216399. The reversal of 85216388 is 88361258.

It can be written as a sum of positive squares in only one way, i.e., 81144064 + 4072324 = 9008^2 + 2018^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10652045 + ... + 10652052.

It is an arithmetic number, because the mean of its divisors is an integer number (24854781).

Almost surely, 2^85216388 is an apocalyptic number.

It is an amenable number.

85216388 is a deficient number, since it is larger than the sum of its proper divisors (63912298).

85216388 is a wasteful number, since it uses less digits than its factorization.

85216388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21304101 (or 21304099 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 85216388 is about 9231.2722850103. The cubic root of 85216388 is about 440.0557573969.

The spelling of 85216388 in words is "eighty-five million, two hundred sixteen thousand, three hundred eighty-eight".