1928469911 has 6 divisors (see below), whose sum is σ = 1957687200. Its totient is φ = 1899682356.

The previous prime is 1928469887. The next prime is 1928469913. The reversal of 1928469911 is 1199648291.

It is not a de Polignac number, because 1928469911 - 2²² = 1924275607 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 1928469911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928469913) 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, 210311 + ... + 219288.

It is an arithmetic number, because the mean of its divisors is an integer number (326281200).

Almost surely, 2^1928469911 is an apocalyptic number.

1928469911 is a deficient number, since it is larger than the sum of its proper divisors (29217289).

1928469911 is an frugal number, since it uses more digits than its factorization.

1928469911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429733 (or 429666 counting only the distinct ones).

The product of its digits is 279936, while the sum is 50.

The square root of 1928469911 is about 43914.3474390774. The cubic root of 1928469911 is about 1244.7179591543.

The spelling of 1928469911 in words is "one billion, nine hundred twenty-eight million, four hundred sixty-nine thousand, nine hundred eleven".