38172901840 has 160 divisors (see below), whose sum is σ = 93661505280. Its totient is φ = 14448709632.

The previous prime is 38172901771. The next prime is 38172901841. The reversal of 38172901840 is 4810927183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38172901841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26379997 + ... + 26381443.

It is an arithmetic number, because the mean of its divisors is an integer number (585384408).

Almost surely, 2^38172901840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38172901840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46830752640).

38172901840 is an abundant number, since it is smaller than the sum of its proper divisors (55488603440).

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

38172901840 is a wasteful number, since it uses less digits than its factorization.

38172901840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709 (or 1703 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 38172901840 in words is "thirty-eight billion, one hundred seventy-two million, nine hundred one thousand, eight hundred forty".