1543204040 has 96 divisors (see below), whose sum is σ = 4081243320. Its totient is φ = 523579392.

The previous prime is 1543204007. The next prime is 1543204093. The reversal of 1543204040 is 404023451.

It can be written as a sum of positive squares in 4 ways, for example, as 1446889444 + 96314596 = 38038^2 + 9814^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1543203997 and 1543204015.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 186062 + ... + 194178.

Almost surely, 2^1543204040 is an apocalyptic number.

1543204040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1543204040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2040621660).

1543204040 is an abundant number, since it is smaller than the sum of its proper divisors (2538039280).

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

1543204040 is a wasteful number, since it uses less digits than its factorization.

1543204040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239 (or 8228 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1543204040 is about 39283.6357787820. The cubic root of 1543204040 is about 1155.6006670560.

Adding to 1543204040 its reverse (404023451), we get a palindrome (1947227491).

The spelling of 1543204040 in words is "one billion, five hundred forty-three million, two hundred four thousand, forty".