19028869 has 4 divisors (see below), whose sum is σ = 19155040. Its totient is φ = 18902700.

The previous prime is 19028827. The next prime is 19028881. The reversal of 19028869 is 96882091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96882091 = 61 ⋅1588231.

It is a cyclic number.

It is not a de Polignac number, because 19028869 - 2⁷ = 19028741 is a prime.

It is a super-2 number, since 2×19028869² = 724195710838322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19028819) 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, 62859 + ... + 63160.

It is an arithmetic number, because the mean of its divisors is an integer number (4788760).

Almost surely, 2^19028869 is an apocalyptic number.

It is an amenable number.

19028869 is a deficient number, since it is larger than the sum of its proper divisors (126171).

19028869 is a wasteful number, since it uses less digits than its factorization.

19028869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126170.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 19028869 is about 4362.2091880147. The cubic root of 19028869 is about 266.9752440027.

The spelling of 19028869 in words is "nineteen million, twenty-eight thousand, eight hundred sixty-nine".