164220858 has 24 divisors (see below), whose sum is σ = 368991168. Its totient is φ = 54740124.

The previous prime is 164220841. The next prime is 164220869. The reversal of 164220858 is 858022461.

164220858 is a `hidden beast` number, since 1 + 642 + 2 + 0 + 8 + 5 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168466 + ... + 169437.

It is an arithmetic number, because the mean of its divisors is an integer number (15374632).

Almost surely, 2^164220858 is an apocalyptic number.

164220858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

164220858 is an abundant number, since it is smaller than the sum of its proper divisors (204770310).

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

164220858 is an equidigital number, since it uses as much as digits as its factorization.

164220858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337920 (or 337908 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 164220858 is about 12814.8686298378. The cubic root of 164220858 is about 547.6159709298.

It can be divided in two parts, 1642 and 20858, that added together give a square (22500 = 150²).

The spelling of 164220858 in words is "one hundred sixty-four million, two hundred twenty thousand, eight hundred fifty-eight".