3521688 has 32 divisors (see below), whose sum is σ = 9268800. Its totient is φ = 1111968.

The previous prime is 3521677. The next prime is 3521689. The reversal of 3521688 is 8861253.

It is a happy number.

3521688 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3406 + ... + 4317.

It is an arithmetic number, because the mean of its divisors is an integer number (289650).

Almost surely, 2^3521688 is an apocalyptic number.

3521688 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3521688 is an abundant number, since it is smaller than the sum of its proper divisors (5747112).

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

3521688 is a wasteful number, since it uses less digits than its factorization.

3521688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7751 (or 7747 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 3521688 is about 1876.6161035225. The cubic root of 3521688 is about 152.1424103922.

The spelling of 3521688 in words is "three million, five hundred twenty-one thousand, six hundred eighty-eight".