3531004040 has 64 divisors (see below), whose sum is σ = 8702218800. Its totient is φ = 1283473408.

The previous prime is 3531004031. The next prime is 3531004049. The reversal of 3531004040 is 404001353.

It is an interprime number because it is at equal distance from previous prime (3531004031) and next prime (3531004049).

It can be written as a sum of positive squares in 8 ways, for example, as 1497535204 + 2033468836 = 38698^2 + 45094^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (3531004049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69809 + ... + 109248.

Almost surely, 2^3531004040 is an apocalyptic number.

It is an amenable number.

3531004040 is an abundant number, since it is smaller than the sum of its proper divisors (5171214760).

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

3531004040 is a wasteful number, since it uses less digits than its factorization.

3531004040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179114 (or 179110 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 3531004040 is about 59422.2520609914. The cubic root of 3531004040 is about 1522.7644808600.

Adding to 3531004040 its reverse (404001353), we get a palindrome (3935005393).

The spelling of 3531004040 in words is "three billion, five hundred thirty-one million, four thousand, forty".