19428369 has 16 divisors (see below), whose sum is σ = 26780544. Its totient is φ = 12521600.

The previous prime is 19428361. The next prime is 19428371. The reversal of 19428369 is 96382491.

It is a cyclic number.

It is not a de Polignac number, because 19428369 - 2³ = 19428361 is a prime.

It is a super-2 number, since 2×19428369² = 754923044000322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19428369.

It is not an unprimeable number, because it can be changed into a prime (19428361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10429 + ... + 12149.

It is an arithmetic number, because the mean of its divisors is an integer number (1673784).

Almost surely, 2^19428369 is an apocalyptic number.

It is an amenable number.

19428369 is a deficient number, since it is larger than the sum of its proper divisors (7352175).

19428369 is a wasteful number, since it uses less digits than its factorization.

19428369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848.

The product of its digits is 93312, while the sum is 42.

The square root of 19428369 is about 4407.7623574780. The cubic root of 19428369 is about 268.8306493848.

The spelling of 19428369 in words is "nineteen million, four hundred twenty-eight thousand, three hundred sixty-nine".