38908720 has 80 divisors (see below), whose sum is σ = 96779520. Its totient is φ = 14515200.

The previous prime is 38908711. The next prime is 38908721. The reversal of 38908720 is 2780983.

38908720 = T₁₅₅ + T₁₅₆ + ... + T₆₁₈.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 38908720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38908721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71650 + ... + 72190.

It is an arithmetic number, because the mean of its divisors is an integer number (1209744).

Almost surely, 2^38908720 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 38908720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48389760).

38908720 is an abundant number, since it is smaller than the sum of its proper divisors (57870800).

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

38908720 is a wasteful number, since it uses less digits than its factorization.

38908720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 38908720 is about 6237.6854681845. The cubic root of 38908720 is about 338.8563651589.

The spelling of 38908720 in words is "thirty-eight million, nine hundred eight thousand, seven hundred twenty".