1812432 has 40 divisors (see below), whose sum is σ = 4766560. Its totient is φ = 593280.

The previous prime is 1812431. The next prime is 1812439. The reversal of 1812432 is 2342181.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1812399 and 1812408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2619 + ... + 3237.

It is an arithmetic number, because the mean of its divisors is an integer number (119164).

2^1812432 is an apocalyptic number.

1812432 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 1812432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2383280).

1812432 is an abundant number, since it is smaller than the sum of its proper divisors (2954128).

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

1812432 is a wasteful number, since it uses less digits than its factorization.

1812432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 685 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 1812432 is about 1346.2659469808. The cubic root of 1812432 is about 121.9234492449.

The spelling of 1812432 in words is "one million, eight hundred twelve thousand, four hundred thirty-two".