164842820 has 12 divisors (see below), whose sum is σ = 346169964. Its totient is φ = 65937120.

The previous prime is 164842819. The next prime is 164842823. The reversal of 164842820 is 28248461.

It can be written as a sum of positive squares in 2 ways, for example, as 50438404 + 114404416 = 7102^2 + 10696^2 .

It is not an unprimeable number, because it can be changed into a prime (164842823) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4121051 + ... + 4121090.

It is an arithmetic number, because the mean of its divisors is an integer number (28847497).

Almost surely, 2^164842820 is an apocalyptic number.

164842820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164842820 is an abundant number, since it is smaller than the sum of its proper divisors (181327144).

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

164842820 is a wasteful number, since it uses less digits than its factorization.

164842820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8242150 (or 8242148 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 164842820 is about 12839.1128977044. The cubic root of 164842820 is about 548.3064379126.

The spelling of 164842820 in words is "one hundred sixty-four million, eight hundred forty-two thousand, eight hundred twenty".