16440985 has 16 divisors (see below), whose sum is σ = 22656960. Its totient is φ = 11327040.

The previous prime is 16440979. The next prime is 16441003. The reversal of 16440985 is 58904461.

It is a happy number.

It is not a de Polignac number, because 16440985 - 2⁵ = 16440953 is a prime.

It is a super-3 number, since 3×16440985³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6822 + ... + 8911.

It is an arithmetic number, because the mean of its divisors is an integer number (1416060).

Almost surely, 2^16440985 is an apocalyptic number.

It is an amenable number.

16440985 is a deficient number, since it is larger than the sum of its proper divisors (6215975).

16440985 is a wasteful number, since it uses less digits than its factorization.

16440985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15768.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 16440985 is about 4054.7484508906. The cubic root of 16440985 is about 254.2782873821.

The spelling of 16440985 in words is "sixteen million, four hundred forty thousand, nine hundred eighty-five".