19028840 has 16 divisors (see below), whose sum is σ = 42814980. Its totient is φ = 7611520.

The previous prime is 19028827. The next prime is 19028881. The reversal of 19028840 is 4882091.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18541636 + 487204 = 4306^2 + 698^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19028797 and 19028806.

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, 237821 + ... + 237900.

Almost surely, 2^19028840 is an apocalyptic number.

19028840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19028840 is an abundant number, since it is smaller than the sum of its proper divisors (23786140).

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

19028840 is a wasteful number, since it uses less digits than its factorization.

19028840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475732 (or 475728 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 19028840 is about 4362.2058640096. The cubic root of 19028840 is about 266.9751083791.

The spelling of 19028840 in words is "nineteen million, twenty-eight thousand, eight hundred forty".