1988830 has 16 divisors (see below), whose sum is σ = 3790800. Its totient is φ = 748672.

The previous prime is 1988807. The next prime is 1988837. The reversal of 1988830 is 388891.

It is a self number, because there is not a number n which added to its sum of digits gives 1988830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5680 + ... + 6019.

It is an arithmetic number, because the mean of its divisors is an integer number (236925).

2^1988830 is an apocalyptic number.

1988830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1988830 is a deficient number, since it is larger than the sum of its proper divisors (1801970).

1988830 is a wasteful number, since it uses less digits than its factorization.

1988830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11723.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1988830 is about 1410.2588414897. The cubic root of 1988830 is about 125.7571116636.

The spelling of 1988830 in words is "one million, nine hundred eighty-eight thousand, eight hundred thirty".