16220736 has 168 divisors, whose sum is σ = 55473600. Its totient is φ = 4603392.

The previous prime is 16220713. The next prime is 16220759. The reversal of 16220736 is 63702261.

It is a happy number.

16220736 is a `hidden beast` number, since 1 + 622 + 0 + 7 + 36 = 666.

It is an interprime number because it is at equal distance from previous prime (16220713) and next prime (16220759).

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×16220736² = 526224552763392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108790 + ... + 108938.

It is an arithmetic number, because the mean of its divisors is an integer number (330200).

Almost surely, 2^16220736 is an apocalyptic number.

16220736 is a gapful number since it is divisible by the number (16) 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 16220736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27736800).

16220736 is an abundant number, since it is smaller than the sum of its proper divisors (39252864).

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

16220736 is an equidigital number, since it uses as much as digits as its factorization.

16220736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 16220736 is about 4027.4974860327. The cubic root of 16220736 is about 253.1377129417.

Adding to 16220736 its reverse (63702261), we get a palindrome (79922997).

The spelling of 16220736 in words is "sixteen million, two hundred twenty thousand, seven hundred thirty-six".