39228681 has 8 divisors (see below), whose sum is σ = 52423200. Its totient is φ = 26093312.

The previous prime is 39228659. The next prime is 39228689. The reversal of 39228681 is 18682293.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39228681 - 2¹⁴ = 39212297 is a prime.

It is a super-2 number, since 2×39228681² = 3077778825999522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39228689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13215 + ... + 15908.

It is an arithmetic number, because the mean of its divisors is an integer number (6552900).

Almost surely, 2^39228681 is an apocalyptic number.

It is an amenable number.

39228681 is a deficient number, since it is larger than the sum of its proper divisors (13194519).

39228681 is a wasteful number, since it uses less digits than its factorization.

39228681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29575.

The product of its digits is 41472, while the sum is 39.

The square root of 39228681 is about 6263.2803705407. The cubic root of 39228681 is about 339.7826783073.

The spelling of 39228681 in words is "thirty-nine million, two hundred twenty-eight thousand, six hundred eighty-one".