1988026 has 4 divisors (see below), whose sum is σ = 2982042. Its totient is φ = 994012.

The previous prime is 1988023. The next prime is 1988033. The reversal of 1988026 is 6208891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 998001 + 990025 = 999^2 + 995^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1987982 and 1988000.

It is not an unprimeable number, because it can be changed into a prime (1988023) 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 as a sum of consecutive naturals, namely, 497005 + ... + 497008.

2^1988026 is an apocalyptic number.

1988026 is a deficient number, since it is larger than the sum of its proper divisors (994016).

1988026 is an equidigital number, since it uses as much as digits as its factorization.

1988026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994015.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1988026 is about 1409.9737586211. The cubic root of 1988026 is about 125.7401632827.

The spelling of 1988026 in words is "one million, nine hundred eighty-eight thousand, twenty-six".