3998397826730 has 16 divisors (see below), whose sum is σ = 7197339469824. Its totient is φ = 1599309490320.

The previous prime is 3998397826711. The next prime is 3998397826751. The reversal of 3998397826730 is 376287938993.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5865866 + ... + 6511925.

It is an arithmetic number, because the mean of its divisors is an integer number (449833716864).

Almost surely, 2^{3998397826730} is an apocalyptic number.

3998397826730 is a deficient number, since it is larger than the sum of its proper divisors (3198941643094).

3998397826730 is a wasteful number, since it uses less digits than its factorization.

3998397826730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12410101.

The product of its (nonzero) digits is 740710656, while the sum is 74.

The spelling of 3998397826730 in words is "three trillion, nine hundred ninety-eight billion, three hundred ninety-seven million, eight hundred twenty-six thousand, seven hundred thirty".