38999242 has 16 divisors (see below), whose sum is σ = 59243400. Its totient is φ = 19253248.

The previous prime is 38999239. The next prime is 38999249. The reversal of 38999242 is 24299983.

It can be written as a sum of positive squares in 4 ways, for example, as 27783441 + 11215801 = 5271^2 + 3349^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38999192 and 38999201.

It is not an unprimeable number, because it can be changed into a prime (38999249) 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, 86634 + ... + 87082.

Almost surely, 2^38999242 is an apocalyptic number.

38999242 is a deficient number, since it is larger than the sum of its proper divisors (20244158).

38999242 is a wasteful number, since it uses less digits than its factorization.

38999242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905.

The product of its digits is 279936, while the sum is 46.

The square root of 38999242 is about 6244.9373095332. The cubic root of 38999242 is about 339.1189472459.

The spelling of 38999242 in words is "thirty-eight million, nine hundred ninety-nine thousand, two hundred forty-two".