19903928 has 32 divisors (see below), whose sum is σ = 41819760. Its totient is φ = 8801280.

The previous prime is 19903921. The next prime is 19903937. The reversal of 19903928 is 82930991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19903921) 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, 200 + ... + 6312.

Almost surely, 2^19903928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19903928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20909880).

19903928 is an abundant number, since it is smaller than the sum of its proper divisors (21915832).

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

19903928 is a wasteful number, since it uses less digits than its factorization.

19903928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6167 (or 6163 counting only the distinct ones).

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

The square root of 19903928 is about 4461.3818487101. The cubic root of 19903928 is about 271.0064313139.

The spelling of 19903928 in words is "nineteen million, nine hundred three thousand, nine hundred twenty-eight".