3900168405 has 24 divisors (see below), whose sum is σ = 7726048512. Its totient is φ = 1782933984.

The previous prime is 3900168401. The next prime is 3900168427. The reversal of 3900168405 is 5048610093.

3900168405 is a `hidden beast` number, since 3 + 90 + 0 + 168 + 405 = 666.

It is not a de Polignac number, because 3900168405 - 2² = 3900168401 is a prime.

It is a super-2 number, since 2×3900168405² = 30422627174720488050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3900168405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900168401) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 6190429 + ... + 6191058.

It is an arithmetic number, because the mean of its divisors is an integer number (321918688).

Almost surely, 2^3900168405 is an apocalyptic number.

3900168405 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3900168405 is a deficient number, since it is larger than the sum of its proper divisors (3825880107).

3900168405 is a wasteful number, since it uses less digits than its factorization.

3900168405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12381505 (or 12381502 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 3900168405 is about 62451.3282885160. The cubic root of 3900168405 is about 1574.0835726924.

Adding to 3900168405 its reverse (5048610093), we get a palindrome (8948778498).

The spelling of 3900168405 in words is "three billion, nine hundred million, one hundred sixty-eight thousand, four hundred five".