82228785 has 16 divisors (see below), whose sum is σ = 132238656. Its totient is φ = 43631168.

The previous prime is 82228781. The next prime is 82228787. The reversal of 82228785 is 58782228.

It is a cyclic number.

It is not a de Polignac number, because 82228785 - 2² = 82228781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82228781) 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, 10959 + ... + 16868.

It is an arithmetic number, because the mean of its divisors is an integer number (8264916).

Almost surely, 2^82228785 is an apocalyptic number.

It is an amenable number.

82228785 is a deficient number, since it is larger than the sum of its proper divisors (50009871).

82228785 is a wasteful number, since it uses less digits than its factorization.

82228785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28032.

The product of its digits is 143360, while the sum is 42.

The square root of 82228785 is about 9068.0088773666. The cubic root of 82228785 is about 434.8518189960.

The spelling of 82228785 in words is "eighty-two million, two hundred twenty-eight thousand, seven hundred eighty-five".