38655986 has 4 divisors (see below), whose sum is σ = 57983982. Its totient is φ = 19327992.

The previous prime is 38655983. The next prime is 38656001. The reversal of 38655986 is 68955683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26884225 + 11771761 = 5185^2 + 3431^2 .

It is not an unprimeable number, because it can be changed into a prime (38655983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9663995 + ... + 9663998.

Almost surely, 2^38655986 is an apocalyptic number.

38655986 is a deficient number, since it is larger than the sum of its proper divisors (19327996).

38655986 is a wasteful number, since it uses less digits than its factorization.

38655986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19327995.

The product of its digits is 1555200, while the sum is 50.

The square root of 38655986 is about 6217.3938269986. The cubic root of 38655986 is about 338.1210833298.

The spelling of 38655986 in words is "thirty-eight million, six hundred fifty-five thousand, nine hundred eighty-six".