1828928639 has 4 divisors (see below), whose sum is σ = 1840578024. Its totient is φ = 1817279256.

The previous prime is 1828928609. The next prime is 1828928671. The reversal of 1828928639 is 9368298281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9368298281 = 389 ⋅24083029.

It is a cyclic number.

It is not a de Polignac number, because 1828928639 - 2²⁴ = 1812151423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1828928609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5824457 + ... + 5824770.

It is an arithmetic number, because the mean of its divisors is an integer number (460144506).

Almost surely, 2^1828928639 is an apocalyptic number.

1828928639 is a deficient number, since it is larger than the sum of its proper divisors (11649385).

1828928639 is a wasteful number, since it uses less digits than its factorization.

1828928639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11649384.

The product of its digits is 2985984, while the sum is 56.

The square root of 1828928639 is about 42765.9752490224. The cubic root of 1828928639 is about 1222.9224569734.

The spelling of 1828928639 in words is "one billion, eight hundred twenty-eight million, nine hundred twenty-eight thousand, six hundred thirty-nine".