38779231680 has 448 divisors, whose sum is σ = 156796922880. Its totient is φ = 8838402048.

The previous prime is 38779231669. The next prime is 38779231721. The reversal of 38779231680 is 8613297783.

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-2 number, since 2×38779231680² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28243474 + ... + 28244846.

Almost surely, 2^38779231680 is an apocalyptic number.

38779231680 is a gapful number since it is divisible by the number (30) 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 38779231680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78398461440).

38779231680 is an abundant number, since it is smaller than the sum of its proper divisors (118017691200).

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

38779231680 is a wasteful number, since it uses less digits than its factorization.

38779231680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873 (or 1857 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 38779231680 in words is "thirty-eight billion, seven hundred seventy-nine million, two hundred thirty-one thousand, six hundred eighty".