1838172 has 48 divisors (see below), whose sum is σ = 4981760. Its totient is φ = 516672.

The previous prime is 1838167. The next prime is 1838173. The reversal of 1838172 is 2718381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838173) 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, 6498 + ... + 6774.

2^1838172 is an apocalyptic number.

1838172 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 1838172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2490880).

1838172 is an abundant number, since it is smaller than the sum of its proper divisors (3143588).

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

1838172 is a wasteful number, since it uses less digits than its factorization.

1838172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 368 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 1838172 is about 1355.7920194484. The cubic root of 1838172 is about 122.4979202757.

The spelling of 1838172 in words is "one million, eight hundred thirty-eight thousand, one hundred seventy-two".