38309855220 has 576 divisors, whose sum is σ = 148599360000. Its totient is φ = 7936137216.

The previous prime is 38309855219. The next prime is 38309855237. The reversal of 38309855220 is 2255890383.

38309855220 is a `hidden beast` number, since 3 + 8 + 3 + 0 + 98 + 552 + 2 + 0 = 666.

It is a super-2 number, since 2×38309855220² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 47354176 + ... + 47354984.

It is an arithmetic number, because the mean of its divisors is an integer number (257985000).

Almost surely, 2^38309855220 is an apocalyptic number.

38309855220 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 38309855220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74299680000).

38309855220 is an abundant number, since it is smaller than the sum of its proper divisors (110289504780).

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

38309855220 is a wasteful number, since it uses less digits than its factorization.

38309855220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 38309855220 in words is "thirty-eight billion, three hundred nine million, eight hundred fifty-five thousand, two hundred twenty".