19764028 has 18 divisors (see below), whose sum is σ = 36505896. Its totient is φ = 9361224.

The previous prime is 19764011. The next prime is 19764037. The reversal of 19764028 is 82046791.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5400 + ... + 8287.

Almost surely, 2^19764028 is an apocalyptic number.

It is an amenable number.

19764028 is a deficient number, since it is larger than the sum of its proper divisors (16741868).

19764028 is a wasteful number, since it uses less digits than its factorization.

19764028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13729 (or 13708 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 19764028 is about 4445.6752018113. The cubic root of 19764028 is about 270.3699911552.

The spelling of 19764028 in words is "nineteen million, seven hundred sixty-four thousand, twenty-eight".