38720723903872 has 64 divisors (see below), whose sum is σ = 79233558049440. Its totient is φ = 18834783621120.

The previous prime is 38720723903803. The next prime is 38720723903891. The reversal of 38720723903872 is 27830932702783.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 38720723903872.

It is a congruent 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, 38178372 + ... + 39179452.

Almost surely, 2^{38720723903872} is an apocalyptic number.

38720723903872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38720723903872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39616779024720).

38720723903872 is an abundant number, since it is smaller than the sum of its proper divisors (40512834145568).

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

38720723903872 is a wasteful number, since it uses less digits than its factorization.

38720723903872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009299 (or 1009287 counting only the distinct ones).

The product of its (nonzero) digits is 42674688, while the sum is 61.

The spelling of 38720723903872 in words is "thirty-eight trillion, seven hundred twenty billion, seven hundred twenty-three million, nine hundred three thousand, eight hundred seventy-two".