83170920 has 64 divisors (see below), whose sum is σ = 285160320. Its totient is φ = 19010304.

The previous prime is 83170873. The next prime is 83170937. The reversal of 83170920 is 2907138.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48667 + ... + 50346.

It is an arithmetic number, because the mean of its divisors is an integer number (4455630).

Almost surely, 2^83170920 is an apocalyptic number.

It is an amenable number.

83170920 is an abundant number, since it is smaller than the sum of its proper divisors (201989400).

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

83170920 is a wasteful number, since it uses less digits than its factorization.

83170920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99034 (or 99030 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 83170920 is about 9119.8092085306. The cubic root of 83170920 is about 436.5062855908.

The spelling of 83170920 in words is "eighty-three million, one hundred seventy thousand, nine hundred twenty".