1919420928 has 160 divisors (see below), whose sum is σ = 5815550400. Its totient is φ = 624734208.

The previous prime is 1919420911. The next prime is 1919420929. The reversal of 1919420928 is 8290249191.

It is not an unprimeable number, because it can be changed into a prime (1919420929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 592818 + ... + 596046.

It is an arithmetic number, because the mean of its divisors is an integer number (36347190).

Almost surely, 2^1919420928 is an apocalyptic number.

1919420928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1919420928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2907775200).

1919420928 is an abundant number, since it is smaller than the sum of its proper divisors (3896129472).

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

1919420928 is an equidigital number, since it uses as much as digits as its factorization.

1919420928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299 (or 3277 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1919420928 is about 43811.1963771819. The cubic root of 1919420928 is about 1242.7680376411.

The spelling of 1919420928 in words is "one billion, nine hundred nineteen million, four hundred twenty thousand, nine hundred twenty-eight".