16001916 has 48 divisors (see below), whose sum is σ = 42932736. Its totient is φ = 4544064.

The previous prime is 16001903. The next prime is 16001959. The reversal of 16001916 is 61910061.

It is a super-2 number, since 2×16001916² = 512122631342112, 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 15 ways as a sum of consecutive naturals, for example, 16065 + ... + 17031.

It is an arithmetic number, because the mean of its divisors is an integer number (894432).

Almost surely, 2^16001916 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 16001916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21466368).

16001916 is an abundant number, since it is smaller than the sum of its proper divisors (26930820).

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

16001916 is a wasteful number, since it uses less digits than its factorization.

16001916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 16001916 is about 4000.2394928304. The cubic root of 16001916 is about 251.9942679472.

Adding to 16001916 its reverse (61910061), we get a palindrome (77911977).

The spelling of 16001916 in words is "sixteen million, one thousand, nine hundred sixteen".