19428569 has 8 divisors (see below), whose sum is σ = 20678400. Its totient is φ = 18190656.

The previous prime is 19428551. The next prime is 19428623. The reversal of 19428569 is 96582491.

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

It is a cyclic number.

It is not a de Polignac number, because 19428569 - 2⁸ = 19428313 is a prime.

It is a super-2 number, since 2×19428569² = 754938586775522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19428509) 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, 512 + ... + 6254.

It is an arithmetic number, because the mean of its divisors is an integer number (2584800).

Almost surely, 2^19428569 is an apocalyptic number.

It is an amenable number.

19428569 is a deficient number, since it is larger than the sum of its proper divisors (1249831).

19428569 is a wasteful number, since it uses less digits than its factorization.

19428569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959.

The product of its digits is 155520, while the sum is 44.

The square root of 19428569 is about 4407.7850446681. The cubic root of 19428569 is about 268.8315718493.

The spelling of 19428569 in words is "nineteen million, four hundred twenty-eight thousand, five hundred sixty-nine".