16897788 has 48 divisors (see below), whose sum is σ = 44288160. Its totient is φ = 5571072.

The previous prime is 16897747. The next prime is 16897799. The reversal of 16897788 is 88779861.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9670 + ... + 11282.

It is an arithmetic number, because the mean of its divisors is an integer number (922670).

Almost surely, 2^16897788 is an apocalyptic number.

16897788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16897788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22144080).

16897788 is an abundant number, since it is smaller than the sum of its proper divisors (27390372).

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

16897788 is a wasteful number, since it uses less digits than its factorization.

16897788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723 (or 1715 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 16897788 is about 4110.6919125617. The cubic root of 16897788 is about 256.6117976451.

The spelling of 16897788 in words is "sixteen million, eight hundred ninety-seven thousand, seven hundred eighty-eight".