16220784 has 40 divisors (see below), whose sum is σ = 42385680. Its totient is φ = 5344768.

The previous prime is 16220779. The next prime is 16220791. The reversal of 16220784 is 48702261.

16220784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16220784² = 526227667149312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2374 + ... + 6170.

It is an arithmetic number, because the mean of its divisors is an integer number (1059642).

Almost surely, 2^16220784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16220784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21192840).

16220784 is an abundant number, since it is smaller than the sum of its proper divisors (26164896).

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

16220784 is a wasteful number, since it uses less digits than its factorization.

16220784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897 (or 3891 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 16220784 is about 4027.5034450637. The cubic root of 16220784 is about 253.1379626344.

The spelling of 16220784 in words is "sixteen million, two hundred twenty thousand, seven hundred eighty-four".