1919540272 has 20 divisors (see below), whose sum is σ = 4005195040. Its totient is φ = 885941568.

The previous prime is 1919540267. The next prime is 1919540281. The reversal of 1919540272 is 2720459191.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4614072 + ... + 4614487.

It is an arithmetic number, because the mean of its divisors is an integer number (200259752).

Almost surely, 2^1919540272 is an apocalyptic number.

It is an amenable number.

1919540272 is an abundant number, since it is smaller than the sum of its proper divisors (2085654768).

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

1919540272 is a wasteful number, since it uses less digits than its factorization.

1919540272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9228580 (or 9228574 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1919540272 is about 43812.5583822721. The cubic root of 1919540272 is about 1242.7937943389.

The spelling of 1919540272 in words is "one billion, nine hundred nineteen million, five hundred forty thousand, two hundred seventy-two".