38899988 has 12 divisors (see below), whose sum is σ = 68122740. Its totient is φ = 19436352.

The previous prime is 38899981. The next prime is 38900003. The reversal of 38899988 is 88999883.

It can be written as a sum of positive squares in 2 ways, for example, as 36820624 + 2079364 = 6068^2 + 1442^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 38899988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38899981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5720 + ... + 10512.

It is an arithmetic number, because the mean of its divisors is an integer number (5676895).

Almost surely, 2^38899988 is an apocalyptic number.

It is an amenable number.

38899988 is a deficient number, since it is larger than the sum of its proper divisors (29222752).

38899988 is a wasteful number, since it uses less digits than its factorization.

38899988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6826 (or 6824 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 62.

The square root of 38899988 is about 6236.9854898019. The cubic root of 38899988 is about 338.8310142422.

The spelling of 38899988 in words is "thirty-eight million, eight hundred ninety-nine thousand, nine hundred eighty-eight".