3728684838406 has 64 divisors (see below), whose sum is σ = 6162859676736. Its totient is φ = 1677899059200.

The previous prime is 3728684838383. The next prime is 3728684838419. The reversal of 3728684838406 is 6048384868273.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1634669986 + ... + 1634672266.

It is an arithmetic number, because the mean of its divisors is an integer number (96294682449).

Almost surely, 2^{3728684838406} is an apocalyptic number.

3728684838406 is a deficient number, since it is larger than the sum of its proper divisors (2434174838330).

3728684838406 is a wasteful number, since it uses less digits than its factorization.

3728684838406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977.

The product of its (nonzero) digits is 297271296, while the sum is 67.

The spelling of 3728684838406 in words is "three trillion, seven hundred twenty-eight billion, six hundred eighty-four million, eight hundred thirty-eight thousand, four hundred six".