164728906 has 16 divisors (see below), whose sum is σ = 250223616. Its totient is φ = 81327456.

The previous prime is 164728901. The next prime is 164728913. The reversal of 164728906 is 609827461.

It is a super-2 number, since 2×164728906² = 54271224943913672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164728901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56230 + ... + 59086.

It is an arithmetic number, because the mean of its divisors is an integer number (15638976).

Almost surely, 2^164728906 is an apocalyptic number.

164728906 is a deficient number, since it is larger than the sum of its proper divisors (85494710).

164728906 is a wasteful number, since it uses less digits than its factorization.

164728906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 164728906 is about 12834.6759211131. The cubic root of 164728906 is about 548.1801071194.

The spelling of 164728906 in words is "one hundred sixty-four million, seven hundred twenty-eight thousand, nine hundred six".