38388918 has 16 divisors (see below), whose sum is σ = 77144256. Its totient is φ = 12735240.

The previous prime is 38388913. The next prime is 38388929. The reversal of 38388918 is 81988383.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38388913) 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, 13896 + ... + 16427.

It is an arithmetic number, because the mean of its divisors is an integer number (4821516).

Almost surely, 2^38388918 is an apocalyptic number.

38388918 is an abundant number, since it is smaller than the sum of its proper divisors (38755338).

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

38388918 is a wasteful number, since it uses less digits than its factorization.

38388918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30539.

The product of its digits is 331776, while the sum is 48.

The square root of 38388918 is about 6195.8791143792. The cubic root of 38388918 is about 337.3406084120.

The spelling of 38388918 in words is "thirty-eight million, three hundred eighty-eight thousand, nine hundred eighteen".