1916172 has 72 divisors (see below), whose sum is σ = 5346432. Its totient is φ = 576000.

The previous prime is 1916147. The next prime is 1916179. The reversal of 1916172 is 2716191.

It is not an unprimeable number, because it can be changed into a prime (1916179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18922 + ... + 19022.

It is an arithmetic number, because the mean of its divisors is an integer number (74256).

2^1916172 is an apocalyptic number.

1916172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1916172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2673216).

1916172 is an abundant number, since it is smaller than the sum of its proper divisors (3430260).

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

1916172 is a wasteful number, since it uses less digits than its factorization.

1916172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 154 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 1916172 is about 1384.2586463519. The cubic root of 1916172 is about 124.2066446848.

The spelling of 1916172 in words is "one million, nine hundred sixteen thousand, one hundred seventy-two".