38216220 has 96 divisors (see below), whose sum is σ = 128755200. Its totient is φ = 8273664.

The previous prime is 38216203. The next prime is 38216231. The reversal of 38216220 is 2261283.

Added to its reverse (2261283) it gives a triangular number (40477503 = T₈₉₉₇).

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, 5586 + ... + 10374.

It is an arithmetic number, because the mean of its divisors is an integer number (1341200).

Almost surely, 2^38216220 is an apocalyptic number.

38216220 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 38216220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64377600).

38216220 is an abundant number, since it is smaller than the sum of its proper divisors (90538980).

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

38216220 is a wasteful number, since it uses less digits than its factorization.

38216220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4827 (or 4825 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 38216220 is about 6181.9268840710. The cubic root of 38216220 is about 336.8339897390.

Adding to 38216220 its reverse (2261283), we get a triangular number (40477503 = T₈₉₉₇).

The spelling of 38216220 in words is "thirty-eight million, two hundred sixteen thousand, two hundred twenty".