39828281 has 8 divisors (see below), whose sum is σ = 41980680. Its totient is φ = 37727872.

The previous prime is 39828253. The next prime is 39828287. The reversal of 39828281 is 18282893.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11833600 + 27994681 = 3440^2 + 5291^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39828281 is a prime.

It is a super-2 number, since 2×39828281² = 3172583934829922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39828287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11420 + ... + 14493.

It is an arithmetic number, because the mean of its divisors is an integer number (5247585).

Almost surely, 2^39828281 is an apocalyptic number.

It is an amenable number.

39828281 is a deficient number, since it is larger than the sum of its proper divisors (2152399).

39828281 is a wasteful number, since it uses less digits than its factorization.

39828281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25995.

The product of its digits is 55296, while the sum is 41.

The square root of 39828281 is about 6310.9651401351. The cubic root of 39828281 is about 341.5050950781.

The spelling of 39828281 in words is "thirty-nine million, eight hundred twenty-eight thousand, two hundred eighty-one".