3951620806 has 16 divisors (see below), whose sum is σ = 6784141824. Its totient is φ = 1691068104.

The previous prime is 3951620797. The next prime is 3951620807. The reversal of 3951620806 is 6080261593.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3951620807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197070 + ... + 216193.

It is an arithmetic number, because the mean of its divisors is an integer number (424008864).

Almost surely, 2^3951620806 is an apocalyptic number.

3951620806 is a deficient number, since it is larger than the sum of its proper divisors (2832521018).

3951620806 is a wasteful number, since it uses less digits than its factorization.

3951620806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413955.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 3951620806 is about 62861.9185676034. The cubic root of 3951620806 is about 1580.9753106124.

The spelling of 3951620806 in words is "three billion, nine hundred fifty-one million, six hundred twenty thousand, eight hundred six".