38921984 has 18 divisors (see below), whose sum is σ = 77692440. Its totient is φ = 19460864.

The previous prime is 38921983. The next prime is 38921989. The reversal of 38921984 is 48912983.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38921983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75764 + ... + 76275.

Almost surely, 2^38921984 is an apocalyptic number.

It is an amenable number.

38921984 is a deficient number, since it is larger than the sum of its proper divisors (38770456).

38921984 is an equidigital number, since it uses as much as digits as its factorization.

38921984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152055 (or 152041 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 38921984 is about 6238.7485924663. The cubic root of 38921984 is about 338.8948662129.

Subtracting 38921984 from its reverse (48912983), we obtain a palindrome (9990999).

The spelling of 38921984 in words is "thirty-eight million, nine hundred twenty-one thousand, nine hundred eighty-four".