164020444 has 18 divisors (see below), whose sum is σ = 333899160. Its totient is φ = 70294392.

The previous prime is 164020421. The next prime is 164020457. The reversal of 164020444 is 444020461.

It is a congruent number.

It is an unprimeable number.

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, 418224 + ... + 418615.

Almost surely, 2^164020444 is an apocalyptic number.

164020444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

164020444 is an abundant number, since it is smaller than the sum of its proper divisors (169878716).

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

164020444 is a wasteful number, since it uses less digits than its factorization.

164020444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836857 (or 836848 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 164020444 is about 12807.0466540885. The cubic root of 164020444 is about 547.3931113311.

The spelling of 164020444 in words is "one hundred sixty-four million, twenty thousand, four hundred forty-four".