3906996820 has 12 divisors (see below), whose sum is σ = 8204693364. Its totient is φ = 1562798720.

The previous prime is 3906996817. The next prime is 3906996827. The reversal of 3906996820 is 286996093.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2467704976 + 1439291844 = 49676^2 + 37938^2 .

It is a super-2 number, since 2×3906996820² = 30529248302980224800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906996827) 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, 97674901 + ... + 97674940.

It is an arithmetic number, because the mean of its divisors is an integer number (683724447).

Almost surely, 2^3906996820 is an apocalyptic number.

It is an amenable number.

3906996820 is an abundant number, since it is smaller than the sum of its proper divisors (4297696544).

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

3906996820 is a wasteful number, since it uses less digits than its factorization.

3906996820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195349850 (or 195349848 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 3906996820 is about 62505.9742744644. The cubic root of 3906996820 is about 1575.0016722918.

The spelling of 3906996820 in words is "three billion, nine hundred six million, nine hundred ninety-six thousand, eight hundred twenty".