19028939 has 4 divisors (see below), whose sum is σ = 19156800. Its totient is φ = 18901080.

The previous prime is 19028927. The next prime is 19028951. The reversal of 19028939 is 93982091.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (19028927) and next prime (19028951).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19028939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19028896 and 19028905.

It is not an unprimeable number, because it can be changed into a prime (19028969) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 63707 + ... + 64004.

It is an arithmetic number, because the mean of its divisors is an integer number (4789200).

Almost surely, 2^19028939 is an apocalyptic number.

19028939 is a deficient number, since it is larger than the sum of its proper divisors (127861).

19028939 is a wasteful number, since it uses less digits than its factorization.

19028939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127860.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 19028939 is about 4362.2172114648. The cubic root of 19028939 is about 266.9755713692.

The spelling of 19028939 in words is "nineteen million, twenty-eight thousand, nine hundred thirty-nine".