3990156205 has 16 divisors (see below), whose sum is σ = 5475576960. Its totient is φ = 2734425792.

The previous prime is 3990156187. The next prime is 3990156211. The reversal of 3990156205 is 5026510993.

It is a happy number.

3990156205 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3990156205 - 2⁷ = 3990156077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24151 + ... + 92539.

It is an arithmetic number, because the mean of its divisors is an integer number (342223560).

Almost surely, 2^3990156205 is an apocalyptic number.

3990156205 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3990156205 is a deficient number, since it is larger than the sum of its proper divisors (1485420755).

3990156205 is a wasteful number, since it uses less digits than its factorization.

3990156205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70068.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 3990156205 is about 63167.6832328050. The cubic root of 3990156205 is about 1586.0978114352.

The spelling of 3990156205 in words is "three billion, nine hundred ninety million, one hundred fifty-six thousand, two hundred five".