16885840 has 20 divisors (see below), whose sum is σ = 39259764. Its totient is φ = 6754304.

The previous prime is 16885807. The next prime is 16885867. The reversal of 16885840 is 4858861.

It can be written as a sum of positive squares in 2 ways, for example, as 7595536 + 9290304 = 2756^2 + 3048^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 16885793 and 16885802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105457 + ... + 105616.

Almost surely, 2^16885840 is an apocalyptic number.

16885840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16885840 is an abundant number, since it is smaller than the sum of its proper divisors (22373924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16885840 is a wasteful number, since it uses less digits than its factorization.

16885840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211086 (or 211080 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 16885840 is about 4109.2383722534. The cubic root of 16885840 is about 256.5513021397.

The spelling of 16885840 in words is "sixteen million, eight hundred eighty-five thousand, eight hundred forty".