16396985 has 32 divisors (see below), whose sum is σ = 22671360. Its totient is φ = 11275200.

The previous prime is 16396973. The next prime is 16396987. The reversal of 16396985 is 58969361.

It is not a de Polignac number, because 16396985 - 2⁴ = 16396969 is a prime.

It is a super-2 number, since 2×16396985² = 537722234180450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16396987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100514 + ... + 100676.

It is an arithmetic number, because the mean of its divisors is an integer number (708480).

Almost surely, 2^16396985 is an apocalyptic number.

It is an amenable number.

16396985 is a deficient number, since it is larger than the sum of its proper divisors (6274375).

16396985 is a wasteful number, since it uses less digits than its factorization.

16396985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269.

The product of its digits is 349920, while the sum is 47.

The square root of 16396985 is about 4049.3190785612. The cubic root of 16396985 is about 254.0512482617.

The spelling of 16396985 in words is "sixteen million, three hundred ninety-six thousand, nine hundred eighty-five".