16397956 has 24 divisors (see below), whose sum is σ = 29790936. Its totient is φ = 7891200.

The previous prime is 16397933. The next prime is 16397981. The reversal of 16397956 is 65979361.

16397956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8468100 + 7929856 = 2910^2 + 2816^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14400 + ... + 15496.

It is an arithmetic number, because the mean of its divisors is an integer number (1241289).

Almost surely, 2^16397956 is an apocalyptic number.

It is an amenable number.

16397956 is a deficient number, since it is larger than the sum of its proper divisors (13392980).

16397956 is a wasteful number, since it uses less digits than its factorization.

16397956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1237 counting only the distinct ones).

The product of its digits is 306180, while the sum is 46.

The square root of 16397956 is about 4049.4389734876. The cubic root of 16397956 is about 254.0562629823.

The spelling of 16397956 in words is "sixteen million, three hundred ninety-seven thousand, nine hundred fifty-six".