803540 has 12 divisors (see below), whose sum is σ = 1687476. Its totient is φ = 321408.

The previous prime is 803519. The next prime is 803549. The reversal of 803540 is 45308.

It can be written as a sum of positive squares in 2 ways, for example, as 559504 + 244036 = 748^2 + 494^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 40177 = 803540 / (8 + 0 + 3 + 5 + 4 + 0).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (803549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20069 + ... + 20108.

It is an arithmetic number, because the mean of its divisors is an integer number (140623).

2⁸⁰³⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

803540 is an abundant number, since it is smaller than the sum of its proper divisors (883936).

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

803540 is a wasteful number, since it uses less digits than its factorization.

803540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40186 (or 40184 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 803540 is about 896.4039268098. The cubic root of 803540 is about 92.9685020708.

Adding to 803540 its reverse (45308), we get a palindrome (848848).

The spelling of 803540 in words is "eight hundred three thousand, five hundred forty".