164421884 has 12 divisors (see below), whose sum is σ = 313896408. Its totient is φ = 74737200.

The previous prime is 164421883. The next prime is 164421889. The reversal of 164421884 is 488124461.

It is a super-3 number, since 3×164421884³ (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164421883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868387 + ... + 1868474.

It is an arithmetic number, because the mean of its divisors is an integer number (26158034).

Almost surely, 2^164421884 is an apocalyptic number.

It is an amenable number.

164421884 is a deficient number, since it is larger than the sum of its proper divisors (149474524).

164421884 is a wasteful number, since it uses less digits than its factorization.

164421884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736876 (or 3736874 counting only the distinct ones).

The product of its digits is 49152, while the sum is 38.

The square root of 164421884 is about 12822.7096980318. The cubic root of 164421884 is about 547.8393289955.

The spelling of 164421884 in words is "one hundred sixty-four million, four hundred twenty-one thousand, eight hundred eighty-four".