38305220 has 24 divisors (see below), whose sum is σ = 81960984. Its totient is φ = 15032576.

The previous prime is 38305187. The next prime is 38305231. The reversal of 38305220 is 2250383.

It can be written as a sum of positive squares in 4 ways, for example, as 8340544 + 29964676 = 2888^2 + 5474^2 .

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, 17009 + ... + 19128.

It is an arithmetic number, because the mean of its divisors is an integer number (3415041).

Almost surely, 2^38305220 is an apocalyptic number.

It is an amenable number.

38305220 is an abundant number, since it is smaller than the sum of its proper divisors (43655764).

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

38305220 is a wasteful number, since it uses less digits than its factorization.

38305220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36199 (or 36197 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 38305220 is about 6189.1211007703. The cubic root of 38305220 is about 337.0952660899.

The spelling of 38305220 in words is "thirty-eight million, three hundred five thousand, two hundred twenty".