19228990 has 32 divisors (see below), whose sum is σ = 38983680. Its totient is φ = 6765600.

The previous prime is 19228987. The next prime is 19229009. The reversal of 19228990 is 9982291.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 591 + ... + 6229.

It is an arithmetic number, because the mean of its divisors is an integer number (1218240).

Almost surely, 2^19228990 is an apocalyptic number.

19228990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19228990 is an abundant number, since it is smaller than the sum of its proper divisors (19754690).

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

19228990 is a wasteful number, since it uses less digits than its factorization.

19228990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5688.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 19228990 is about 4385.0872283228. The cubic root of 19228990 is about 267.9078821298.

The spelling of 19228990 in words is "nineteen million, two hundred twenty-eight thousand, nine hundred ninety".