38421216 has 120 divisors (see below), whose sum is σ = 115320744. Its totient is φ = 12597120.

The previous prime is 38421209. The next prime is 38421269. The reversal of 38421216 is 61212483.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 38421216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 629826 + ... + 629886.

Almost surely, 2^38421216 is an apocalyptic number.

38421216 is a gapful number since it is divisible by the number (36) 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 38421216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57660372).

38421216 is an abundant number, since it is smaller than the sum of its proper divisors (76899528).

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

38421216 is an frugal number, since it uses more digits than its factorization.

38421216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 66 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 38421216 is about 6198.4849761857. The cubic root of 38421216 is about 337.4351875544.

Adding to 38421216 its reverse (61212483), we get a palindrome (99633699).

The spelling of 38421216 in words is "thirty-eight million, four hundred twenty-one thousand, two hundred sixteen".