1828989 has 6 divisors (see below), whose sum is σ = 2641886. Its totient is φ = 1219320.

The previous prime is 1828973. The next prime is 1828993. The reversal of 1828989 is 9898281.

It can be written as a sum of positive squares in only one way, i.e., 1172889 + 656100 = 1083^2 + 810^2 .

It is not a de Polignac number, because 1828989 - 2⁴ = 1828973 is a prime.

It is an Ulam number.

It is a Duffinian number.

1828989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1828999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101602 + ... + 101619.

2^1828989 is an apocalyptic number.

It is an amenable number.

1828989 is a deficient number, since it is larger than the sum of its proper divisors (812897).

1828989 is a wasteful number, since it uses less digits than its factorization.

1828989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203227 (or 203224 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 1828989 is about 1352.4011978699. The cubic root of 1828989 is about 122.2935910389.

The spelling of 1828989 in words is "one million, eight hundred twenty-eight thousand, nine hundred eighty-nine".