38778242 has 4 divisors (see below), whose sum is σ = 58167366. Its totient is φ = 19389120.

The previous prime is 38778239. The next prime is 38778247. The reversal of 38778242 is 24287783.

38778242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24287783 = 13 ⋅1868291.

It can be written as a sum of positive squares in only one way, i.e., 33166081 + 5612161 = 5759^2 + 2369^2 .

It is a super-2 number, since 2×38778242² = 3007504105221128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38778242.

It is not an unprimeable number, because it can be changed into a prime (38778247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9694559 + ... + 9694562.

Almost surely, 2^38778242 is an apocalyptic number.

38778242 is a deficient number, since it is larger than the sum of its proper divisors (19389124).

38778242 is a wasteful number, since it uses less digits than its factorization.

38778242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19389123.

The product of its digits is 150528, while the sum is 41.

The square root of 38778242 is about 6227.2178378470. The cubic root of 38778242 is about 338.4771629707.

The spelling of 38778242 in words is "thirty-eight million, seven hundred seventy-eight thousand, two hundred forty-two".