9911916 has 72 divisors (see below), whose sum is σ = 29909040. Its totient is φ = 2830464.

The previous prime is 9911861. The next prime is 9911917. The reversal of 9911916 is 6191199.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (9911917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4356 + ... + 6228.

Almost surely, 2^9911916 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 9911916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14954520).

9911916 is an abundant number, since it is smaller than the sum of its proper divisors (19997124).

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

9911916 is a wasteful number, since it uses less digits than its factorization.

9911916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900 (or 1885 counting only the distinct ones).

The product of its digits is 4374, while the sum is 36.

The square root of 9911916 is about 3148.3195517609. The cubic root of 9911916 is about 214.8090317978.

It can be divided in two parts, 9 and 911916, that added together give a triangular number (911925 = T₁₃₅₀).

The spelling of 9911916 in words is "nine million, nine hundred eleven thousand, nine hundred sixteen".