1919716240 has 40 divisors (see below), whose sum is σ = 4806676728. Its totient is φ = 708817920.

The previous prime is 1919716223. The next prime is 1919716273. The reversal of 1919716240 is 426179191.

It can be written as a sum of positive squares in 4 ways, for example, as 113806224 + 1805910016 = 10668^2 + 42496^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1919716193 and 1919716202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921901 + ... + 923980.

Almost surely, 2^1919716240 is an apocalyptic number.

1919716240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1919716240 is an abundant number, since it is smaller than the sum of its proper divisors (2886960488).

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

1919716240 is a wasteful number, since it uses less digits than its factorization.

1919716240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845907 (or 1845901 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1919716240 is about 43814.5665275830. The cubic root of 1919716240 is about 1242.8317696221.

The spelling of 1919716240 in words is "one billion, nine hundred nineteen million, seven hundred sixteen thousand, two hundred forty".