1988940 has 24 divisors (see below), whose sum is σ = 5569200. Its totient is φ = 530368.

The previous prime is 1988933. The next prime is 1988941. The reversal of 1988940 is 498891.

It is not an unprimeable number, because it can be changed into a prime (1988941) by changing a digit.

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, 16515 + ... + 16634.

It is an arithmetic number, because the mean of its divisors is an integer number (232050).

2^1988940 is an apocalyptic number.

1988940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1988940 is an abundant number, since it is smaller than the sum of its proper divisors (3580260).

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

1988940 is a wasteful number, since it uses less digits than its factorization.

1988940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33161 (or 33159 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1988940 is about 1410.2978408833. The cubic root of 1988940 is about 125.7594301167.

The spelling of 1988940 in words is "one million, nine hundred eighty-eight thousand, nine hundred forty".