38938440 has 64 divisors (see below), whose sum is σ = 117754560. Its totient is φ = 10300160.

The previous prime is 38938439. The next prime is 38938441. The reversal of 38938440 is 4483983.

It is an interprime number because it is at equal distance from previous prime (38938439) and next prime (38938441).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (38938441) 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, 14482 + ... + 16958.

It is an arithmetic number, because the mean of its divisors is an integer number (1839915).

Almost surely, 2^38938440 is an apocalyptic number.

38938440 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 38938440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58877280).

38938440 is an abundant number, since it is smaller than the sum of its proper divisors (78816120).

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

38938440 is a wasteful number, since it uses less digits than its factorization.

38938440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622 (or 2618 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 38938440 is about 6240.0673073293. The cubic root of 38938440 is about 338.9426204430.

The spelling of 38938440 in words is "thirty-eight million, nine hundred thirty-eight thousand, four hundred forty".