38666890 has 16 divisors (see below), whose sum is σ = 71219808. Its totient is φ = 15106896.

The previous prime is 38666861. The next prime is 38666939. The reversal of 38666890 is 9866683.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 38666890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44532 + ... + 45391.

It is an arithmetic number, because the mean of its divisors is an integer number (4451238).

Almost surely, 2^38666890 is an apocalyptic number.

38666890 is a deficient number, since it is larger than the sum of its proper divisors (32552918).

38666890 is a wasteful number, since it uses less digits than its factorization.

38666890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89973.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 38666890 is about 6218.2706599182. The cubic root of 38666890 is about 338.1528725046.

It can be divided in two parts, 386 and 66890, that added together give a palindrome (67276).

The spelling of 38666890 in words is "thirty-eight million, six hundred sixty-six thousand, eight hundred ninety".