1540047040 has 56 divisors (see below), whose sum is σ = 4191134112. Its totient is φ = 528015360.

The previous prime is 1540046947. The next prime is 1540047077. The reversal of 1540047040 is 407400451.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 1540046996 and 1540047014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341521 + ... + 346000.

Almost surely, 2^1540047040 is an apocalyptic number.

1540047040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540047040 is an abundant number, since it is smaller than the sum of its proper divisors (2651087072).

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

1540047040 is an equidigital number, since it uses as much as digits as its factorization.

1540047040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687545 (or 687535 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 1540047040 is about 39243.4330812176. The cubic root of 1540047040 is about 1154.8121081390.

Adding to 1540047040 its reverse (407400451), we get a palindrome (1947447491).

The spelling of 1540047040 in words is "one billion, five hundred forty million, forty-seven thousand, forty".