16442985 has 64 divisors (see below), whose sum is σ = 30336768. Its totient is φ = 7547904.

The previous prime is 16442983. The next prime is 16443001. The reversal of 16442985 is 58924461.

It is not a de Polignac number, because 16442985 - 2¹ = 16442983 is a prime.

It is a super-3 number, since 3×16442985³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (16442983) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 310219 + ... + 310271.

It is an arithmetic number, because the mean of its divisors is an integer number (474012).

Almost surely, 2^16442985 is an apocalyptic number.

16442985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16442985 is a deficient number, since it is larger than the sum of its proper divisors (13893783).

16442985 is a wasteful number, since it uses less digits than its factorization.

16442985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154.

The product of its digits is 69120, while the sum is 39.

The square root of 16442985 is about 4054.9950678145. The cubic root of 16442985 is about 254.2885977123.

The spelling of 16442985 in words is "sixteen million, four hundred forty-two thousand, nine hundred eighty-five".