3521912820 has 48 divisors (see below), whose sum is σ = 9891204288. Its totient is φ = 936334080.

The previous prime is 3521912809. The next prime is 3521912873. The reversal of 3521912820 is 282191253.

It is a happy number.

It is a super-3 number, since 3×3521912820³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 68809 + ... + 108528.

It is an arithmetic number, because the mean of its divisors is an integer number (206066756).

Almost surely, 2^3521912820 is an apocalyptic number.

3521912820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3521912820 is an abundant number, since it is smaller than the sum of its proper divisors (6369291468).

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

3521912820 is a wasteful number, since it uses less digits than its factorization.

3521912820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177680 (or 177678 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 3521912820 is about 59345.7059946210. The cubic root of 3521912820 is about 1521.4564784810.

The spelling of 3521912820 in words is "three billion, five hundred twenty-one million, nine hundred twelve thousand, eight hundred twenty".