1989612 has 36 divisors (see below), whose sum is σ = 5326776. Its totient is φ = 624000.

The previous prime is 1989583. The next prime is 1989613. The reversal of 1989612 is 2169891.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1989613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1014 + ... + 2237.

It is an arithmetic number, because the mean of its divisors is an integer number (147966).

2^1989612 is an apocalyptic number.

1989612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1989612 is an abundant number, since it is smaller than the sum of its proper divisors (3337164).

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

1989612 is a wasteful number, since it uses less digits than its factorization.

1989612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3278 (or 3273 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 1989612 is about 1410.5360683088. The cubic root of 1989612 is about 125.7735919016.

It can be divided in two parts, 1989 and 612, that added together give a square (2601 = 51²).

The spelling of 1989612 in words is "one million, nine hundred eighty-nine thousand, six hundred twelve".