19945828 has 24 divisors (see below), whose sum is σ = 42239232. Its totient is φ = 8045184.

The previous prime is 19945799. The next prime is 19945829. The reversal of 19945828 is 82854991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19945829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20476 + ... + 21427.

It is an arithmetic number, because the mean of its divisors is an integer number (1759968).

Almost surely, 2^19945828 is an apocalyptic number.

It is an amenable number.

19945828 is an abundant number, since it is smaller than the sum of its proper divisors (22293404).

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

19945828 is a wasteful number, since it uses less digits than its factorization.

19945828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41931 (or 41929 counting only the distinct ones).

The product of its digits is 207360, while the sum is 46.

The square root of 19945828 is about 4466.0752344760. The cubic root of 19945828 is about 271.1964643367.

The spelling of 19945828 in words is "nineteen million, nine hundred forty-five thousand, eight hundred twenty-eight".