19840628 has 12 divisors (see below), whose sum is σ = 36230880. Its totient is φ = 9488952.

The previous prime is 19840619. The next prime is 19840631. The reversal of 19840628 is 82604891.

It is a junction number, because it is equal to n+sod(n) for n = 19840591 and 19840600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107738 + ... + 107921.

It is an arithmetic number, because the mean of its divisors is an integer number (3019240).

Almost surely, 2^19840628 is an apocalyptic number.

It is an amenable number.

19840628 is a deficient number, since it is larger than the sum of its proper divisors (16390252).

19840628 is a wasteful number, since it uses less digits than its factorization.

19840628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215686 (or 215684 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 19840628 is about 4454.2819847872. The cubic root of 19840628 is about 270.7188343988.

The spelling of 19840628 in words is "nineteen million, eight hundred forty thousand, six hundred twenty-eight".