1828121439 has 8 divisors (see below), whose sum is σ = 2456688640. Its totient is φ = 1209150936.

The previous prime is 1828121413. The next prime is 1828121453. The reversal of 1828121439 is 9341218281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1828121439 - 2²⁷ = 1693903711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1828121397 and 1828121406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1828121039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2398729 + ... + 2399490.

It is an arithmetic number, because the mean of its divisors is an integer number (307086080).

Almost surely, 2^1828121439 is an apocalyptic number.

1828121439 is a deficient number, since it is larger than the sum of its proper divisors (628567201).

1828121439 is a wasteful number, since it uses less digits than its factorization.

1828121439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798349.

The product of its digits is 27648, while the sum is 39.

The square root of 1828121439 is about 42756.5367984826. The cubic root of 1828121439 is about 1222.7425177005.

The spelling of 1828121439 in words is "one billion, eight hundred twenty-eight million, one hundred twenty-one thousand, four hundred thirty-nine".