16397906 has 16 divisors (see below), whose sum is σ = 28192320. Its totient is φ = 7007280.

The previous prime is 16397903. The next prime is 16397933. The reversal of 16397906 is 60979361.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16397903) 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 7 ways as a sum of consecutive naturals, for example, 3941 + ... + 6951.

It is an arithmetic number, because the mean of its divisors is an integer number (1762020).

Almost surely, 2^16397906 is an apocalyptic number.

16397906 is a deficient number, since it is larger than the sum of its proper divisors (11794414).

16397906 is a wasteful number, since it uses less digits than its factorization.

16397906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 16397906 is about 4049.4327997881. The cubic root of 16397906 is about 254.0560047626.

The spelling of 16397906 in words is "sixteen million, three hundred ninety-seven thousand, nine hundred six".