16402668 has 12 divisors (see below), whose sum is σ = 38272920. Its totient is φ = 5467552.

The previous prime is 16402667. The next prime is 16402679. The reversal of 16402668 is 86620461.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (16402667) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 683433 + ... + 683456.

It is an arithmetic number, because the mean of its divisors is an integer number (3189410).

Almost surely, 2^16402668 is an apocalyptic number.

It is an amenable number.

16402668 is an abundant number, since it is smaller than the sum of its proper divisors (21870252).

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

16402668 is a wasteful number, since it uses less digits than its factorization.

16402668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366896 (or 1366894 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 16402668 is about 4050.0207406876. The cubic root of 16402668 is about 254.0805952520.

The spelling of 16402668 in words is "sixteen million, four hundred two thousand, six hundred sixty-eight".