164187748 has 18 divisors (see below), whose sum is σ = 289009266. Its totient is φ = 81615744.

The previous prime is 164187743. The next prime is 164187767. The reversal of 164187748 is 847781461.

It can be written as a sum of positive squares in 3 ways, for example, as 40043584 + 124144164 = 6328^2 + 11142^2 .

It is a junction number, because it is equal to n+sod(n) for n = 164187698 and 164187707.

It is not an unprimeable number, because it can be changed into a prime (164187743) 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 5 ways as a sum of consecutive naturals, for example, 470278 + ... + 470626.

Almost surely, 2^164187748 is an apocalyptic number.

It is an amenable number.

164187748 is a deficient number, since it is larger than the sum of its proper divisors (124821518).

164187748 is an equidigital number, since it uses as much as digits as its factorization.

164187748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039 (or 688 counting only the distinct ones).

The product of its digits is 301056, while the sum is 46.

The square root of 164187748 is about 12813.5767059787. The cubic root of 164187748 is about 547.5791652448.

The spelling of 164187748 in words is "one hundred sixty-four million, one hundred eighty-seven thousand, seven hundred forty-eight".