3990838436218 has 32 divisors (see below), whose sum is σ = 6340359098880. Its totient is φ = 1878712542000.

The previous prime is 3990838436201. The next prime is 3990838436231. The reversal of 3990838436218 is 8126348380993.

It is a self number, because there is not a number n which added to its sum of digits gives 3990838436218.

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, 5180283 + ... + 5900593.

It is an arithmetic number, because the mean of its divisors is an integer number (198136221840).

Almost surely, 2^{3990838436218} is an apocalyptic number.

3990838436218 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3990838436218 is a deficient number, since it is larger than the sum of its proper divisors (2349520662662).

3990838436218 is a wasteful number, since it uses less digits than its factorization.

3990838436218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721234.

The product of its (nonzero) digits is 53747712, while the sum is 64.

The spelling of 3990838436218 in words is "three trillion, nine hundred ninety billion, eight hundred thirty-eight million, four hundred thirty-six thousand, two hundred eighteen".