38717440 has 96 divisors (see below), whose sum is σ = 98280000. Its totient is φ = 14598144.

The previous prime is 38717423. The next prime is 38717473. The reversal of 38717440 is 4471783.

It is a junction number, because it is equal to n+sod(n) for n = 38717396 and 38717405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194461 + ... + 194659.

It is an arithmetic number, because the mean of its divisors is an integer number (1023750).

Almost surely, 2^38717440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38717440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49140000).

38717440 is an abundant number, since it is smaller than the sum of its proper divisors (59562560).

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

38717440 is a wasteful number, since it uses less digits than its factorization.

38717440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 38717440 is about 6222.3339672506. Note that the first 3 decimals coincide. The cubic root of 38717440 is about 338.3001663449.

It can be divided in two parts, 3871 and 7440, that added together give a palindrome (11311).

The spelling of 38717440 in words is "thirty-eight million, seven hundred seventeen thousand, four hundred forty".