19628885 has 16 divisors (see below), whose sum is σ = 24165120. Its totient is φ = 15301440.

The previous prime is 19628857. The next prime is 19628899. The reversal of 19628885 is 58882691.

It is not a de Polignac number, because 19628885 - 2¹⁴ = 19612501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42164 + ... + 42626.

It is an arithmetic number, because the mean of its divisors is an integer number (1510320).

Almost surely, 2^19628885 is an apocalyptic number.

It is an amenable number.

19628885 is a deficient number, since it is larger than the sum of its proper divisors (4536235).

19628885 is a wasteful number, since it uses less digits than its factorization.

19628885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668.

The product of its digits is 276480, while the sum is 47.

The square root of 19628885 is about 4430.4497514361. The cubic root of 19628885 is about 269.7523334743.

The spelling of 19628885 in words is "nineteen million, six hundred twenty-eight thousand, eight hundred eighty-five".