38889513 has 24 divisors (see below), whose sum is σ = 61497800. Its totient is φ = 23535360.

The previous prime is 38889503. The next prime is 38889517. The reversal of 38889513 is 31598883.

It can be written as a sum of positive squares in 4 ways, for example, as 4173849 + 34715664 = 2043^2 + 5892^2 .

It is not a de Polignac number, because 38889513 - 2⁶ = 38889449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38889517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4413 + ... + 9861.

Almost surely, 2^38889513 is an apocalyptic number.

It is an amenable number.

38889513 is a deficient number, since it is larger than the sum of its proper divisors (22608287).

38889513 is a wasteful number, since it uses less digits than its factorization.

38889513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5529 (or 5526 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 38889513 is about 6236.1456846357. The cubic root of 38889513 is about 338.8005980074.

The spelling of 38889513 in words is "thirty-eight million, eight hundred eighty-nine thousand, five hundred thirteen".