16164440 has 32 divisors (see below), whose sum is σ = 38286000. Its totient is φ = 6125184.

The previous prime is 16164409. The next prime is 16164457. The reversal of 16164440 is 4446161.

It is a super-2 number, since 2×16164440² = 522578241027200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 9875 + ... + 11394.

Almost surely, 2^16164440 is an apocalyptic number.

16164440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16164440 is an abundant number, since it is smaller than the sum of its proper divisors (22121560).

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

16164440 is a wasteful number, since it uses less digits than its factorization.

16164440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21299 (or 21295 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 16164440 is about 4020.5024561614. The cubic root of 16164440 is about 252.8445252851.

The spelling of 16164440 in words is "sixteen million, one hundred sixty-four thousand, four hundred forty".