1988158 has 16 divisors (see below), whose sum is σ = 3116304. Its totient is φ = 950400.

The previous prime is 1988137. The next prime is 1988177. The reversal of 1988158 is 8518891.

It is a self number, because there is not a number n which added to its sum of digits gives 1988158.

It is a congruent number.

It is an unprimeable number.

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, 4758 + ... + 5158.

It is an arithmetic number, because the mean of its divisors is an integer number (194769).

2^1988158 is an apocalyptic number.

1988158 is a deficient number, since it is larger than the sum of its proper divisors (1128146).

1988158 is a wasteful number, since it uses less digits than its factorization.

1988158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507.

The product of its digits is 23040, while the sum is 40.

The square root of 1988158 is about 1410.0205672259. The cubic root of 1988158 is about 125.7429461662.

The spelling of 1988158 in words is "one million, nine hundred eighty-eight thousand, one hundred fifty-eight".