38656081 has 4 divisors (see below), whose sum is σ = 38694964. Its totient is φ = 38617200.

The previous prime is 38656049. The next prime is 38656103. The reversal of 38656081 is 18065683.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31979025 + 6677056 = 5655^2 + 2584^2 .

It is a cyclic number.

It is not a de Polignac number, because 38656081 - 2⁵ = 38656049 is a prime.

It is a super-2 number, since 2×38656081² = 2988585196557122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38656081.

It is not an unprimeable number, because it can be changed into a prime (38656001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17910 + ... + 19951.

It is an arithmetic number, because the mean of its divisors is an integer number (9673741).

Almost surely, 2^38656081 is an apocalyptic number.

It is an amenable number.

38656081 is a deficient number, since it is larger than the sum of its proper divisors (38883).

38656081 is a wasteful number, since it uses less digits than its factorization.

38656081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38882.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 38656081 is about 6217.4014668509. The cubic root of 38656081 is about 338.1213603156.

The spelling of 38656081 in words is "thirty-eight million, six hundred fifty-six thousand, eighty-one".