38447520 has 96 divisors (see below), whose sum is σ = 122072832. Its totient is φ = 10171392.

The previous prime is 38447503. The next prime is 38447537. The reversal of 38447520 is 2574483.

It is an interprime number because it is at equal distance from previous prime (38447503) and next prime (38447537).

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82809 + ... + 83271.

It is an arithmetic number, because the mean of its divisors is an integer number (1271592).

Almost surely, 2^38447520 is an apocalyptic number.

38447520 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 38447520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61036416).

38447520 is an abundant number, since it is smaller than the sum of its proper divisors (83625312).

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

38447520 is a wasteful number, since it uses less digits than its factorization.

38447520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 38447520 is about 6200.6064219558. The cubic root of 38447520 is about 337.5121751438.

The spelling of 38447520 in words is "thirty-eight million, four hundred forty-seven thousand, five hundred twenty".