38638542 has 16 divisors (see below), whose sum is σ = 77962320. Its totient is φ = 12765312.

The previous prime is 38638517. The next prime is 38638543. The reversal of 38638542 is 24583683.

It is a self number, because there is not a number n which added to its sum of digits gives 38638542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38638543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27817 + ... + 29172.

It is an arithmetic number, because the mean of its divisors is an integer number (4872645).

Almost surely, 2^38638542 is an apocalyptic number.

38638542 is an abundant number, since it is smaller than the sum of its proper divisors (39323778).

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

38638542 is a wasteful number, since it uses less digits than its factorization.

38638542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57107.

The product of its digits is 138240, while the sum is 39.

The square root of 38638542 is about 6215.9908301091. The cubic root of 38638542 is about 338.0702152132.

The spelling of 38638542 in words is "thirty-eight million, six hundred thirty-eight thousand, five hundred forty-two".