1616216 has 64 divisors (see below), whose sum is σ = 3840000. Its totient is φ = 635040.

The previous prime is 1616201. The next prime is 1616221. The reversal of 1616216 is 6126161.

It is a super-2 number, since 2×1616216² = 5224308317312, which contains 22 as substring.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1616191 and 1616200.

It is a congruent number.

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, 52121 + ... + 52151.

It is an arithmetic number, because the mean of its divisors is an integer number (60000).

2^1616216 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 1616216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1920000).

1616216 is an abundant number, since it is smaller than the sum of its proper divisors (2223784).

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

1616216 is a wasteful number, since it uses less digits than its factorization.

1616216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 59 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 1616216 is about 1271.3048414916. The cubic root of 1616216 is about 117.3545143695.

The spelling of 1616216 in words is "one million, six hundred sixteen thousand, two hundred sixteen".