85621016 has 32 divisors (see below), whose sum is σ = 174588960. Its totient is φ = 39128832.

The previous prime is 85621013. The next prime is 85621037. The reversal of 85621016 is 61012658.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 85621016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85621013) 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, 6716 + ... + 14708.

It is an arithmetic number, because the mean of its divisors is an integer number (5455905).

Almost surely, 2^85621016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85621016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87294480).

85621016 is an abundant number, since it is smaller than the sum of its proper divisors (88967944).

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

85621016 is a wasteful number, since it uses less digits than its factorization.

85621016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8115 (or 8111 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 85621016 is about 9253.1624864151. The cubic root of 85621016 is about 440.7511549374.

The spelling of 85621016 in words is "eighty-five million, six hundred twenty-one thousand, sixteen".