164728894 has 8 divisors (see below), whose sum is σ = 269556408. Its totient is φ = 74876760.

The previous prime is 164728873. The next prime is 164728897. The reversal of 164728894 is 498827461.

It is a happy number.

164728894 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164728897) 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, 3743817 + ... + 3743860.

It is an arithmetic number, because the mean of its divisors is an integer number (33694551).

Almost surely, 2^164728894 is an apocalyptic number.

164728894 is a deficient number, since it is larger than the sum of its proper divisors (104827514).

164728894 is a wasteful number, since it uses less digits than its factorization.

164728894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487690.

The product of its digits is 774144, while the sum is 49.

The square root of 164728894 is about 12834.6754536295. The cubic root of 164728894 is about 548.1800938083.

The spelling of 164728894 in words is "one hundred sixty-four million, seven hundred twenty-eight thousand, eight hundred ninety-four".