38013520 has 20 divisors (see below), whose sum is σ = 88381620. Its totient is φ = 15205376.

The previous prime is 38013497. The next prime is 38013529. The reversal of 38013520 is 2531083.

It can be written as a sum of positive squares in 2 ways, for example, as 24880144 + 13133376 = 4988^2 + 3624^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 38013491 and 38013500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38013529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237505 + ... + 237664.

It is an arithmetic number, because the mean of its divisors is an integer number (4419081).

Almost surely, 2^38013520 is an apocalyptic number.

It is an amenable number.

38013520 is an abundant number, since it is smaller than the sum of its proper divisors (50368100).

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

38013520 is a wasteful number, since it uses less digits than its factorization.

38013520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475182 (or 475176 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 38013520 is about 6165.5105222520. The cubic root of 38013520 is about 336.2374078009.

The spelling of 38013520 in words is "thirty-eight million, thirteen thousand, five hundred twenty".