38557638 has 48 divisors (see below), whose sum is σ = 96435456. Its totient is φ = 10905840.

The previous prime is 38557573. The next prime is 38557639. The reversal of 38557638 is 83675583.

38557638 is a `hidden beast` number, since 3 + 8 + 5 + 5 + 7 + 638 = 666.

38557638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 38557593 and 38557602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38557639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11493 + ... + 14463.

It is an arithmetic number, because the mean of its divisors is an integer number (2009072).

Almost surely, 2^38557638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38557638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48217728).

38557638 is an abundant number, since it is smaller than the sum of its proper divisors (57877818).

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

38557638 is a wasteful number, since it uses less digits than its factorization.

38557638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089 (or 3086 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 38557638 is about 6209.4796883475. The cubic root of 38557638 is about 337.8340922173.

The spelling of 38557638 in words is "thirty-eight million, five hundred fifty-seven thousand, six hundred thirty-eight".