1540620040 has 32 divisors (see below), whose sum is σ = 3617110080. Its totient is φ = 589454272.

The previous prime is 1540620013. The next prime is 1540620047. The reversal of 1540620040 is 400260451.

It is a junction number, because it is equal to n+sod(n) for n = 1540619993 and 1540620020.

It is not an unprimeable number, because it can be changed into a prime (1540620047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836374 + ... + 838213.

It is an arithmetic number, because the mean of its divisors is an integer number (113034690).

Almost surely, 2^1540620040 is an apocalyptic number.

1540620040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540620040 is an abundant number, since it is smaller than the sum of its proper divisors (2076490040).

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

1540620040 is a wasteful number, since it uses less digits than its factorization.

1540620040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674621 (or 1674617 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1540620040 is about 39250.7329867864. The cubic root of 1540620040 is about 1154.9553127017.

Adding to 1540620040 its reverse (400260451), we get a palindrome (1940880491).

The spelling of 1540620040 in words is "one billion, five hundred forty million, six hundred twenty thousand, forty".