164187996 has 48 divisors (see below), whose sum is σ = 440294400. Its totient is φ = 46647360.

The previous prime is 164187979. The next prime is 164188021. The reversal of 164187996 is 699781461.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9805 + ... + 20603.

It is an arithmetic number, because the mean of its divisors is an integer number (9172800).

Almost surely, 2^164187996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164187996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220147200).

164187996 is an abundant number, since it is smaller than the sum of its proper divisors (276106404).

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

164187996 is a wasteful number, since it uses less digits than its factorization.

164187996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10994 (or 10992 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 164187996 is about 12813.5863832106. The cubic root of 164187996 is about 547.5794409446.

The spelling of 164187996 in words is "one hundred sixty-four million, one hundred eighty-seven thousand, nine hundred ninety-six".