38652778 has 4 divisors (see below), whose sum is σ = 57979170. Its totient is φ = 19326388.

The previous prime is 38652773. The next prime is 38652793. The reversal of 38652778 is 87725683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87725683 = 71 ⋅1235573.

It can be written as a sum of positive squares in only one way, i.e., 21372129 + 17280649 = 4623^2 + 4157^2 .

It is not an unprimeable number, because it can be changed into a prime (38652773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9663193 + ... + 9663196.

Almost surely, 2^38652778 is an apocalyptic number.

38652778 is a deficient number, since it is larger than the sum of its proper divisors (19326392).

38652778 is a wasteful number, since it uses less digits than its factorization.

38652778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19326391.

The product of its digits is 564480, while the sum is 46.

The square root of 38652778 is about 6217.1358357366. The cubic root of 38652778 is about 338.1117296906. Note that the first 3 decimals are identical.

The spelling of 38652778 in words is "thirty-eight million, six hundred fifty-two thousand, seven hundred seventy-eight".