16991960 has 32 divisors (see below), whose sum is σ = 38502000. Its totient is φ = 6748800.

The previous prime is 16991951. The next prime is 16992007. The reversal of 16991960 is 6919961.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4535 + ... + 7385.

Almost surely, 2^16991960 is an apocalyptic number.

16991960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16991960 is an abundant number, since it is smaller than the sum of its proper divisors (21510040).

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

16991960 is a wasteful number, since it uses less digits than its factorization.

16991960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011 (or 3007 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 16991960 is about 4122.1305170991. The cubic root of 16991960 is about 257.0876171758.

It can be divided in two parts, 169 and 91960, that added together give a palindrome (92129).

The spelling of 16991960 in words is "sixteen million, nine hundred ninety-one thousand, nine hundred sixty".