1540019912 has 8 divisors (see below), whose sum is σ = 2887537350. Its totient is φ = 770009952.

The previous prime is 1540019911. The next prime is 1540019959. The reversal of 1540019912 is 2199100451.

It can be written as a sum of positive squares in only one way, i.e., 1402802116 + 137217796 = 37454^2 + 11714^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1540019912² = 4743322658712975488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1540019911) 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 as a sum of consecutive naturals, namely, 96251237 + ... + 96251252.

Almost surely, 2^1540019912 is an apocalyptic number.

It is an amenable number.

1540019912 is a deficient number, since it is larger than the sum of its proper divisors (1347517438).

1540019912 is a wasteful number, since it uses less digits than its factorization.

1540019912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192502495 (or 192502491 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 1540019912 is about 39243.0874422490. The cubic root of 1540019912 is about 1154.8053274096.

The spelling of 1540019912 in words is "one billion, five hundred forty million, nineteen thousand, nine hundred twelve".