3985398749724 has 96 divisors (see below), whose sum is σ = 11320273843200. Its totient is φ = 1065286413312.

The previous prime is 3985398749723. The next prime is 3985398749749. The reversal of 3985398749724 is 4279478935893.

It is a self number, because there is not a number n which added to its sum of digits gives 3985398749724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985398749723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8117499 + ... + 8594450.

It is an arithmetic number, because the mean of its divisors is an integer number (117919519200).

Almost surely, 2^{3985398749724} is an apocalyptic number.

3985398749724 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

3985398749724 is an abundant number, since it is smaller than the sum of its proper divisors (7334875093476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3985398749724 is a wasteful number, since it uses less digits than its factorization.

3985398749724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16712147 (or 16712145 counting only the distinct ones).

The product of its digits is 3292047360, while the sum is 78.

It can be divided in two parts, 39853987 and 49724, that added together give a triangular number (39903711 = T₈₉₃₃).

The spelling of 3985398749724 in words is "three trillion, nine hundred eighty-five billion, three hundred ninety-eight million, seven hundred forty-nine thousand, seven hundred twenty-four".