16405768 has 8 divisors (see below), whose sum is σ = 30760830. Its totient is φ = 8202880.

The previous prime is 16405751. The next prime is 16405771. The reversal of 16405768 is 86750461.

It can be written as a sum of positive squares in only one way, i.e., 12236004 + 4169764 = 3498^2 + 2042^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025353 + ... + 1025368.

Almost surely, 2^16405768 is an apocalyptic number.

It is an amenable number.

16405768 is a deficient number, since it is larger than the sum of its proper divisors (14355062).

16405768 is a wasteful number, since it uses less digits than its factorization.

16405768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050727 (or 2050723 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 16405768 is about 4050.4034366962. The cubic root of 16405768 is about 254.0966007829.

The spelling of 16405768 in words is "sixteen million, four hundred five thousand, seven hundred sixty-eight".