1540317128 has 32 divisors (see below), whose sum is σ = 3301940160. Its totient is φ = 659883840.

The previous prime is 1540317127. The next prime is 1540317131. The reversal of 1540317128 is 8217130451.

It is a junction number, because it is equal to n+sod(n) for n = 1540317094 and 1540317103.

It is not an unprimeable number, because it can be changed into a prime (1540317127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275723 + ... + 281253.

It is an arithmetic number, because the mean of its divisors is an integer number (103185630).

Almost surely, 2^1540317128 is an apocalyptic number.

It is an amenable number.

1540317128 is an abundant number, since it is smaller than the sum of its proper divisors (1761623032).

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

1540317128 is a wasteful number, since it uses less digits than its factorization.

1540317128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10517 (or 10513 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1540317128 is about 39246.8741175651. The cubic root of 1540317128 is about 1154.8796131466.

Adding to 1540317128 its reverse (8217130451), we get a palindrome (9757447579).

The spelling of 1540317128 in words is "one billion, five hundred forty million, three hundred seventeen thousand, one hundred twenty-eight".