1540352140 has 12 divisors (see below), whose sum is σ = 3234739536. Its totient is φ = 616140848.

The previous prime is 1540351993. The next prime is 1540352179. The reversal of 1540352140 is 412530451.

It is a happy number.

1540352140 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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, 38508784 + ... + 38508823.

It is an arithmetic number, because the mean of its divisors is an integer number (269561628).

Almost surely, 2^1540352140 is an apocalyptic number.

1540352140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540352140 is an abundant number, since it is smaller than the sum of its proper divisors (1694387396).

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

1540352140 is a wasteful number, since it uses less digits than its factorization.

1540352140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77017616 (or 77017614 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1540352140 is about 39247.3201632927. The cubic root of 1540352140 is about 1154.8883633660. Note that the first 3 decimals are identical.

Adding to 1540352140 its reverse (412530451), we get a palindrome (1952882591).

The spelling of 1540352140 in words is "one billion, five hundred forty million, three hundred fifty-two thousand, one hundred forty".