3521000404 has 12 divisors (see below), whose sum is σ = 6218281300. Its totient is φ = 1744348608.

The previous prime is 3521000393. The next prime is 3521000411. The reversal of 3521000404 is 4040001253.

It can be written as a sum of positive squares in 2 ways, for example, as 2011522500 + 1509477904 = 44850^2 + 38852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4037409 + ... + 4038280.

Almost surely, 2^3521000404 is an apocalyptic number.

It is an amenable number.

3521000404 is a deficient number, since it is larger than the sum of its proper divisors (2697280896).

3521000404 is a wasteful number, since it uses less digits than its factorization.

3521000404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8075802 (or 8075800 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 3521000404 is about 59338.0182008129. The cubic root of 3521000404 is about 1521.3250800807.

Adding to 3521000404 its reverse (4040001253), we get a palindrome (7561001657).

The spelling of 3521000404 in words is "three billion, five hundred twenty-one million, four hundred four", and thus it is an aban number.