38221740 has 96 divisors (see below), whose sum is σ = 122189760. Its totient is φ = 9911808.

The previous prime is 38221723. The next prime is 38221741. The reversal of 38221740 is 4712283.

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

It is not an unprimeable number, because it can be changed into a prime (38221741) 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, 19024 + ... + 20936.

It is an arithmetic number, because the mean of its divisors is an integer number (1272810).

Almost surely, 2^38221740 is an apocalyptic number.

38221740 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 38221740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61094880).

38221740 is an abundant number, since it is smaller than the sum of its proper divisors (83968020).

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

38221740 is a wasteful number, since it uses less digits than its factorization.

38221740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968 (or 1960 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 38221740 is about 6182.3733306878. The cubic root of 38221740 is about 336.8502065366.

It can be divided in two parts, 382 and 21740, that added together give a palindrome (22122).

The spelling of 38221740 in words is "thirty-eight million, two hundred twenty-one thousand, seven hundred forty".