16491916 has 48 divisors (see below), whose sum is σ = 34272000. Its totient is φ = 6798528.

The previous prime is 16491911. The next prime is 16491931. The reversal of 16491916 is 61919461.

It is not an unprimeable number, because it can be changed into a prime (16491911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110610 + ... + 110758.

It is an arithmetic number, because the mean of its divisors is an integer number (714000).

Almost surely, 2^16491916 is an apocalyptic number.

It is an amenable number.

16491916 is an abundant number, since it is smaller than the sum of its proper divisors (17780084).

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

16491916 is a wasteful number, since it uses less digits than its factorization.

16491916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 284 counting only the distinct ones).

The product of its digits is 11664, while the sum is 37.

The square root of 16491916 is about 4061.0240087938. The cubic root of 16491916 is about 254.5405850800.

It can be divided in two parts, 16491 and 916, that multiplied together give a triangular number (15105756 = T₅₄₉₆).

The spelling of 16491916 in words is "sixteen million, four hundred ninety-one thousand, nine hundred sixteen".