38816261 has 4 divisors (see below), whose sum is σ = 42345024. Its totient is φ = 35287500.

The previous prime is 38816257. The next prime is 38816263. The reversal of 38816261 is 16261883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16261883 = 11 ⋅1478353.

It is a cyclic number.

It is not a de Polignac number, because 38816261 - 2² = 38816257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38816263) 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, 1764365 + ... + 1764386.

It is an arithmetic number, because the mean of its divisors is an integer number (10586256).

Almost surely, 2^38816261 is an apocalyptic number.

It is an amenable number.

38816261 is a deficient number, since it is larger than the sum of its proper divisors (3528763).

38816261 is a wasteful number, since it uses less digits than its factorization.

38816261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3528762.

The product of its digits is 13824, while the sum is 35.

The square root of 38816261 is about 6230.2697373388. The cubic root of 38816261 is about 338.5877435381.

The spelling of 38816261 in words is "thirty-eight million, eight hundred sixteen thousand, two hundred sixty-one".