19428636 has 12 divisors (see below), whose sum is σ = 45333512. Its totient is φ = 6476208.

The previous prime is 19428623. The next prime is 19428667. The reversal of 19428636 is 63682491.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 19428594 and 19428603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809515 + ... + 809538.

Almost surely, 2^19428636 is an apocalyptic number.

It is an amenable number.

19428636 is an abundant number, since it is smaller than the sum of its proper divisors (25904876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19428636 is a wasteful number, since it uses less digits than its factorization.

19428636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619060 (or 1619058 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 19428636 is about 4407.7926448507. The cubic root of 19428636 is about 268.8318808735.

The spelling of 19428636 in words is "nineteen million, four hundred twenty-eight thousand, six hundred thirty-six".