38690 has 16 divisors (see below), whose sum is σ = 71928. Its totient is φ = 14976.

The previous prime is 38677. The next prime is 38693. The reversal of 38690 is 9683.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 34969 + 3721 = 187^2 + 61^2 .

It is a super-2 number, since 2×38690² = 2993832200, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 38690.

It is not an unprimeable number, because it can be changed into a prime (38693) by changing a digit.

38690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494 + ... + 566.

2³⁸⁶⁹⁰ is an apocalyptic number.

38690 is a deficient number, since it is larger than the sum of its proper divisors (33238).

38690 is a wasteful number, since it uses less digits than its factorization.

38690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 38690 is about 196.6977376586. The cubic root of 38690 is about 33.8220226913.

The spelling of 38690 in words is "thirty-eight thousand, six hundred ninety".