1989924 has 24 divisors (see below), whose sum is σ = 4680480. Its totient is φ = 657984.

The previous prime is 1989919. The next prime is 1989947. The reversal of 1989924 is 4299891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072 + ... + 2264.

It is an arithmetic number, because the mean of its divisors is an integer number (195020).

2^1989924 is an apocalyptic number.

It is an amenable number.

1989924 is an abundant number, since it is smaller than the sum of its proper divisors (2690556).

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

1989924 is a wasteful number, since it uses less digits than its factorization.

1989924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339 (or 1337 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 1989924 is about 1410.6466602236. The cubic root of 1989924 is about 125.7801659320.

The spelling of 1989924 in words is "one million, nine hundred eighty-nine thousand, nine hundred twenty-four".