164043890 has 8 divisors (see below), whose sum is σ = 295279020. Its totient is φ = 65617552.

The previous prime is 164043881. The next prime is 164043917. The reversal of 164043890 is 98340461.

164043890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 148035889 + 16008001 = 12167^2 + 4001^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 164043890.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8202185 + ... + 8202204.

Almost surely, 2^164043890 is an apocalyptic number.

164043890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164043890 is a deficient number, since it is larger than the sum of its proper divisors (131235130).

164043890 is a wasteful number, since it uses less digits than its factorization.

164043890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16404396.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 164043890 is about 12807.9619768330. The cubic root of 164043890 is about 547.4191925665.

The spelling of 164043890 in words is "one hundred sixty-four million, forty-three thousand, eight hundred ninety".