38923378728144 has 160 divisors (see below), whose sum is σ = 101919803572224. Its totient is φ = 12799198863360.

The previous prime is 38923378728139. The next prime is 38923378728181. The reversal of 38923378728144 is 44182787332983.

It is a super-2 number, since 2×38923378728144² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3205410937 + ... + 3205423079.

Almost surely, 2^{38923378728144} is an apocalyptic number.

It is an amenable number.

38923378728144 is an abundant number, since it is smaller than the sum of its proper divisors (62996424844080).

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

38923378728144 is a wasteful number, since it uses less digits than its factorization.

38923378728144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15225 (or 15219 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 69.

The spelling of 38923378728144 in words is "thirty-eight trillion, nine hundred twenty-three billion, three hundred seventy-eight million, seven hundred twenty-eight thousand, one hundred forty-four".