1988920 has 32 divisors (see below), whose sum is σ = 4712400. Its totient is φ = 753408.

The previous prime is 1988897. The next prime is 1988933. The reversal of 1988920 is 298891.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1988920.

It is a congruent number.

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, 549 + ... + 2068.

2^1988920 is an apocalyptic number.

1988920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1988920 is an abundant number, since it is smaller than the sum of its proper divisors (2723480).

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

1988920 is a wasteful number, since it uses less digits than its factorization.

1988920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647 (or 2643 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1988920 is about 1410.2907501647. The cubic root of 1988920 is about 125.7590085862.

The spelling of 1988920 in words is "one million, nine hundred eighty-eight thousand, nine hundred twenty".