1683972 has 36 divisors (see below), whose sum is σ = 4406220. Its totient is φ = 541632.

The previous prime is 1683971. The next prime is 1683977. The reversal of 1683972 is 2793861.

It can be written as a sum of positive squares in 2 ways, for example, as 968256 + 715716 = 984^2 + 846^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 238 + ... + 1850.

It is an arithmetic number, because the mean of its divisors is an integer number (122395).

2^1683972 is an apocalyptic number.

1683972 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 1683972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2203110).

1683972 is an abundant number, since it is smaller than the sum of its proper divisors (2722248).

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

1683972 is a wasteful number, since it uses less digits than its factorization.

1683972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1647 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1683972 is about 1297.6794673570. The cubic root of 1683972 is about 118.9720528491.

The spelling of 1683972 in words is "one million, six hundred eighty-three thousand, nine hundred seventy-two".