38212720 has 160 divisors (see below), whose sum is σ = 113742720. Its totient is φ = 11612160.

The previous prime is 38212711. The next prime is 38212721. The reversal of 38212720 is 2721283.

38212720 is nontrivially palindromic in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38212721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211030 + ... + 211210.

It is an arithmetic number, because the mean of its divisors is an integer number (710892).

Almost surely, 2^38212720 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 38212720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56871360).

38212720 is an abundant number, since it is smaller than the sum of its proper divisors (75530000).

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

38212720 is a wasteful number, since it uses less digits than its factorization.

38212720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 38212720 is about 6181.6437943317. The cubic root of 38212720 is about 336.8237065403.

The spelling of 38212720 in words is "thirty-eight million, two hundred twelve thousand, seven hundred twenty".