38905972 has 24 divisors (see below), whose sum is σ = 81196416. Its totient is φ = 15948768.

The previous prime is 38905969. The next prime is 38905973. The reversal of 38905972 is 27950983.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38905973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29563 + ... + 30850.

It is an arithmetic number, because the mean of its divisors is an integer number (3383184).

Almost surely, 2^38905972 is an apocalyptic number.

It is an amenable number.

38905972 is an abundant number, since it is smaller than the sum of its proper divisors (42290444).

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

38905972 is a wasteful number, since it uses less digits than its factorization.

38905972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60447 (or 60445 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 38905972 is about 6237.4651902836. The cubic root of 38905972 is about 338.8483875195.

The spelling of 38905972 in words is "thirty-eight million, nine hundred five thousand, nine hundred seventy-two".