3985398749690 has 32 divisors (see below), whose sum is σ = 7840723774464. Its totient is φ = 1451985880320.

The previous prime is 3985398749669. The next prime is 3985398749723. The reversal of 3985398749690 is 969478935893.

It is a super-2 number, since 2×3985398749690² (a number of 26 digits) contains 22 as substring.

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, 378116054 + ... + 378126593.

It is an arithmetic number, because the mean of its divisors is an integer number (245022617952).

Almost surely, 2^{3985398749690} is an apocalyptic number.

3985398749690 is a deficient number, since it is larger than the sum of its proper divisors (3855325024774).

3985398749690 is a wasteful number, since it uses less digits than its factorization.

3985398749690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756242702.

The product of its (nonzero) digits is 3174474240, while the sum is 80.

The spelling of 3985398749690 in words is "three trillion, nine hundred eighty-five billion, three hundred ninety-eight million, seven hundred forty-nine thousand, six hundred ninety".