38820320 has 192 divisors, whose sum is σ = 120185856. Its totient is φ = 11489280.

The previous prime is 38820307. The next prime is 38820347. The reversal of 38820320 is 2302883.

It is a self number, because there is not a number n which added to its sum of digits gives 38820320.

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, 283292 + ... + 283428.

It is an arithmetic number, because the mean of its divisors is an integer number (625968).

Almost surely, 2^38820320 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 38820320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60092928).

38820320 is an abundant number, since it is smaller than the sum of its proper divisors (81365536).

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

38820320 is a wasteful number, since it uses less digits than its factorization.

38820320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 38820320 is about 6230.5954771595. The cubic root of 38820320 is about 338.5995451192.

The spelling of 38820320 in words is "thirty-eight million, eight hundred twenty thousand, three hundred twenty".