19490928 has 40 divisors (see below), whose sum is σ = 50592000. Its totient is φ = 6465984.

The previous prime is 19490923. The next prime is 19490957. The reversal of 19490928 is 82909491.

It is a self number, because there is not a number n which added to its sum of digits gives 19490928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19490923) 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, 10623 + ... + 12321.

It is an arithmetic number, because the mean of its divisors is an integer number (1264800).

Almost surely, 2^19490928 is an apocalyptic number.

It is an amenable number.

19490928 is an abundant number, since it is smaller than the sum of its proper divisors (31101072).

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

19490928 is a wasteful number, since it uses less digits than its factorization.

19490928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1943 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 19490928 is about 4414.8531119393. The cubic root of 19490928 is about 269.1188835273.

The spelling of 19490928 in words is "nineteen million, four hundred ninety thousand, nine hundred twenty-eight".