1988590 has 8 divisors (see below), whose sum is σ = 3579480. Its totient is φ = 795432.

The previous prime is 1988587. The next prime is 1988599. The reversal of 1988590 is 958891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99420 + ... + 99439.

It is an arithmetic number, because the mean of its divisors is an integer number (447435).

2^1988590 is an apocalyptic number.

1988590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1988590 is a deficient number, since it is larger than the sum of its proper divisors (1590890).

1988590 is a wasteful number, since it uses less digits than its factorization.

1988590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198866.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1988590 is about 1410.1737481601. The cubic root of 1988590 is about 125.7520529238.

The spelling of 1988590 in words is "one million, nine hundred eighty-eight thousand, five hundred ninety".