1988359 has 8 divisors (see below), whose sum is σ = 2056320. Its totient is φ = 1921656.

The previous prime is 1988353. The next prime is 1988411. The reversal of 1988359 is 9538891.

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

It is a cyclic number.

It is not a de Polignac number, because 1988359 - 2¹¹ = 1986311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3702 + ... + 4204.

It is an arithmetic number, because the mean of its divisors is an integer number (257040).

2^1988359 is an apocalyptic number.

1988359 is a deficient number, since it is larger than the sum of its proper divisors (67961).

1988359 is an equidigital number, since it uses as much as digits as its factorization.

1988359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629.

The product of its digits is 77760, while the sum is 43.

The square root of 1988359 is about 1410.0918409806. The cubic root of 1988359 is about 125.7471835022.

The spelling of 1988359 in words is "one million, nine hundred eighty-eight thousand, three hundred fifty-nine".