19835428 has 12 divisors (see below), whose sum is σ = 34905052. Its totient is φ = 9862560.

The previous prime is 19835393. The next prime is 19835429. The reversal of 19835428 is 82453891.

It can be written as a sum of positive squares in 2 ways, for example, as 5531904 + 14303524 = 2352^2 + 3782^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (19835429) by changing a digit.

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, 12975 + ... + 14422.

Almost surely, 2^19835428 is an apocalyptic number.

It is an amenable number.

19835428 is a deficient number, since it is larger than the sum of its proper divisors (15069624).

19835428 is a wasteful number, since it uses less digits than its factorization.

19835428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27582 (or 27580 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 19835428 is about 4453.6982385429. The cubic root of 19835428 is about 270.6951815699.

The spelling of 19835428 in words is "nineteen million, eight hundred thirty-five thousand, four hundred twenty-eight".