85209132 has 12 divisors (see below), whose sum is σ = 198821336. Its totient is φ = 28403040.

The previous prime is 85209079. The next prime is 85209133. The reversal of 85209132 is 23190258.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 85209132.

It is not an unprimeable number, because it can be changed into a prime (85209133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3550369 + ... + 3550392.

Almost surely, 2^85209132 is an apocalyptic number.

It is an amenable number.

85209132 is an abundant number, since it is smaller than the sum of its proper divisors (113612204).

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

85209132 is a wasteful number, since it uses less digits than its factorization.

85209132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100768 (or 7100766 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 85209132 is about 9230.8792647288. The cubic root of 85209132 is about 440.0432670951.

The spelling of 85209132 in words is "eighty-five million, two hundred nine thousand, one hundred thirty-two".