1989748 has 24 divisors (see below), whose sum is σ = 3817800. Its totient is φ = 903168.

The previous prime is 1989721. The next prime is 1989769. The reversal of 1989748 is 8479891.

It is a happy number.

1989748 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 381924 + 1607824 = 618^2 + 1268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1989698 and 1989707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1468 + ... + 2476.

It is an arithmetic number, because the mean of its divisors is an integer number (159075).

2^1989748 is an apocalyptic number.

It is an amenable number.

1989748 is a deficient number, since it is larger than the sum of its proper divisors (1828052).

1989748 is a wasteful number, since it uses less digits than its factorization.

1989748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1057 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 1989748 is about 1410.5842761069. The cubic root of 1989748 is about 125.7764575891.

The spelling of 1989748 in words is "one million, nine hundred eighty-nine thousand, seven hundred forty-eight".