1986432 has 64 divisors (see below), whose sum is σ = 6038400. Its totient is φ = 566784.

The previous prime is 1986421. The next prime is 1986437. The reversal of 1986432 is 2346891.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 1986393 and 1986402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986437) 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, 2319 + ... + 3057.

It is an arithmetic number, because the mean of its divisors is an integer number (94350).

2^1986432 is an apocalyptic number.

1986432 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 1986432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3019200).

1986432 is an abundant number, since it is smaller than the sum of its proper divisors (4051968).

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

1986432 is an equidigital number, since it uses as much as digits as its factorization.

1986432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763 (or 751 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 1986432 is about 1409.4083865225. The cubic root of 1986432 is about 125.7065481267.

The spelling of 1986432 in words is "one million, nine hundred eighty-six thousand, four hundred thirty-two".