38690786 has 4 divisors (see below), whose sum is σ = 58036182. Its totient is φ = 19345392.

The previous prime is 38690767. The next prime is 38690791. The reversal of 38690786 is 68709683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68709683 = 7 ⋅9815669.

It can be written as a sum of positive squares in only one way, i.e., 25694761 + 12996025 = 5069^2 + 3605^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 38690786.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9672695 + ... + 9672698.

Almost surely, 2^38690786 is an apocalyptic number.

38690786 is a deficient number, since it is larger than the sum of its proper divisors (19345396).

38690786 is a wasteful number, since it uses less digits than its factorization.

38690786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19345395.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 38690786 is about 6220.1917976860. The cubic root of 38690786 is about 338.2225172492. Note that the first 3 decimals are identical.

The spelling of 38690786 in words is "thirty-eight million, six hundred ninety thousand, seven hundred eighty-six".