1919308740 has 96 divisors (see below), whose sum is σ = 5579038080. Its totient is φ = 492420096.

The previous prime is 1919308723. The next prime is 1919308753. The reversal of 1919308740 is 478039191.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1919308692 and 1919308701.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 532384 + ... + 535976.

It is an arithmetic number, because the mean of its divisors is an integer number (58114980).

Almost surely, 2^1919308740 is an apocalyptic number.

1919308740 is a gapful number since it is divisible by the number (10) 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 1919308740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2789519040).

1919308740 is an abundant number, since it is smaller than the sum of its proper divisors (3659729340).

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

1919308740 is a wasteful number, since it uses less digits than its factorization.

1919308740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941 (or 3939 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1919308740 is about 43809.9160008325. The cubic root of 1919308740 is about 1242.7438243701.

The spelling of 1919308740 in words is "one billion, nine hundred nineteen million, three hundred eight thousand, seven hundred forty".