1986424 has 16 divisors (see below), whose sum is σ = 4063320. Its totient is φ = 902880.

The previous prime is 1986421. The next prime is 1986437. The reversal of 1986424 is 4246891.

It is a self number, because there is not a number n which added to its sum of digits gives 1986424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11199 + ... + 11374.

2^1986424 is an apocalyptic number.

It is an amenable number.

1986424 is an abundant number, since it is smaller than the sum of its proper divisors (2076896).

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

1986424 is a wasteful number, since it uses less digits than its factorization.

1986424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22590 (or 22586 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 1986424 is about 1409.4055484494. The cubic root of 1986424 is about 125.7063793729.

The spelling of 1986424 in words is "one million, nine hundred eighty-six thousand, four hundred twenty-four".