19850028 has 24 divisors (see below), whose sum is σ = 50527680. Its totient is φ = 6015120.

The previous prime is 19850021. The next prime is 19850059. The reversal of 19850028 is 82005891.

It is a happy number.

It is a super-2 number, since 2×19850028² = 788047223201568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (19850021) 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 7 ways as a sum of consecutive naturals, for example, 75058 + ... + 75321.

It is an arithmetic number, because the mean of its divisors is an integer number (2105320).

Almost surely, 2^19850028 is an apocalyptic number.

It is an amenable number.

19850028 is an abundant number, since it is smaller than the sum of its proper divisors (30677652).

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

19850028 is a wasteful number, since it uses less digits than its factorization.

19850028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150397 (or 150395 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 19850028 is about 4455.3370242890. The cubic root of 19850028 is about 270.7615809501.

The spelling of 19850028 in words is "nineteen million, eight hundred fifty thousand, twenty-eight".