1928228099 has 8 divisors (see below), whose sum is σ = 2207186688. Its totient is φ = 1650143880.

The previous prime is 1928228089. The next prime is 1928228123. The reversal of 1928228099 is 9908228291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1928228099 - 2⁸ = 1928227843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1928228089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213857 + ... + 222690.

It is an arithmetic number, because the mean of its divisors is an integer number (275898336).

Almost surely, 2^1928228099 is an apocalyptic number.

1928228099 is a deficient number, since it is larger than the sum of its proper divisors (278958589).

1928228099 is an equidigital number, since it uses as much as digits as its factorization.

1928228099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437185.

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 1928228099 is about 43911.5941295690. The cubic root of 1928228099 is about 1244.6659316689.

The spelling of 1928228099 in words is "one billion, nine hundred twenty-eight million, two hundred twenty-eight thousand, ninety-nine".