164038890 has 32 divisors (see below), whose sum is σ = 395176320. Its totient is φ = 43578944.

The previous prime is 164038873. The next prime is 164038961. The reversal of 164038890 is 98830461.

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 15 ways as a sum of consecutive naturals, for example, 2094 + ... + 18233.

It is an arithmetic number, because the mean of its divisors is an integer number (12349260).

Almost surely, 2^164038890 is an apocalyptic number.

164038890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164038890 is an abundant number, since it is smaller than the sum of its proper divisors (231137430).

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

164038890 is a wasteful number, since it uses less digits than its factorization.

164038890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20606.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 164038890 is about 12807.7667842602. The cubic root of 164038890 is about 547.4136307952.

The spelling of 164038890 in words is "one hundred sixty-four million, thirty-eight thousand, eight hundred ninety".