38243220 has 48 divisors (see below), whose sum is σ = 108201408. Its totient is φ = 10091520.

The previous prime is 38243213. The next prime is 38243221. The reversal of 38243220 is 2234283.

Added to its reverse (2234283) it gives a triangular number (40477503 = T₈₉₉₇).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38243221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2535 + ... + 9105.

It is an arithmetic number, because the mean of its divisors is an integer number (2254196).

Almost surely, 2^38243220 is an apocalyptic number.

38243220 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 38243220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54100704).

38243220 is an abundant number, since it is smaller than the sum of its proper divisors (69958188).

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

38243220 is a wasteful number, since it uses less digits than its factorization.

38243220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6680 (or 6678 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 38243220 is about 6184.1102836221. The cubic root of 38243220 is about 336.9132961765.

Adding to 38243220 its reverse (2234283), we get a triangular number (40477503 = T₈₉₉₇).

The spelling of 38243220 in words is "thirty-eight million, two hundred forty-three thousand, two hundred twenty".