1988628 has 12 divisors (see below), whose sum is σ = 4640160. Its totient is φ = 662872.

The previous prime is 1988611. The next prime is 1988633. The reversal of 1988628 is 8268891.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1988628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82848 + ... + 82871.

It is an arithmetic number, because the mean of its divisors is an integer number (386680).

2^1988628 is an apocalyptic number.

It is an amenable number.

1988628 is an abundant number, since it is smaller than the sum of its proper divisors (2651532).

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

1988628 is a wasteful number, since it uses less digits than its factorization.

1988628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165726 (or 165724 counting only the distinct ones).

The product of its digits is 55296, while the sum is 42.

The square root of 1988628 is about 1410.1872216128. The cubic root of 1988628 is about 125.7528539180.

The spelling of 1988628 in words is "one million, nine hundred eighty-eight thousand, six hundred twenty-eight".