1839809449 has 9 divisors (see below), whose sum is σ = 1874099037. Its totient is φ = 1806138444.

The previous prime is 1839809443. The next prime is 1839809453. The reversal of 1839809449 is 9449089381.

The square root of 1839809449 is 42893.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1839809449 - 2⁵ = 1839809417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1839809449.

It is not an unprimeable number, because it can be changed into a prime (1839809443) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2530324 + ... + 2531050.

Almost surely, 2^1839809449 is an apocalyptic number.

1839809449 is the 42893-rd square number.

1839809449 is the 21447-th centered octagonal number.

It is an amenable number.

1839809449 is a deficient number, since it is larger than the sum of its proper divisors (34289588).

1839809449 is an frugal number, since it uses more digits than its factorization.

1839809449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 55.

The cubic root of 1839809449 is about 1225.3428331573.

The spelling of 1839809449 in words is "one billion, eight hundred thirty-nine million, eight hundred nine thousand, four hundred forty-nine".