1988834 has 4 divisors (see below), whose sum is σ = 2983254. Its totient is φ = 994416.

The previous prime is 1988807. The next prime is 1988837. The reversal of 1988834 is 4388891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4388891 = 13 ⋅337607.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 896809 = 1045^2 + 947^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1988791 and 1988800.

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497207 + ... + 497210.

2^1988834 is an apocalyptic number.

1988834 is a deficient number, since it is larger than the sum of its proper divisors (994420).

1988834 is an equidigital number, since it uses as much as digits as its factorization.

1988834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994419.

The product of its digits is 55296, while the sum is 41.

The square root of 1988834 is about 1410.2602596684. The cubic root of 1988834 is about 125.7571959725.

The spelling of 1988834 in words is "one million, nine hundred eighty-eight thousand, eight hundred thirty-four".