39216845 has 8 divisors (see below), whose sum is σ = 48683160. Its totient is φ = 30291520.

The previous prime is 39216823. The next prime is 39216857. The reversal of 39216845 is 54861293.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 104329 + 39112516 = 323^2 + 6254^2 .

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

It is not a de Polignac number, because 39216845 - 2¹² = 39212749 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 39216799 and 39216808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135086 + ... + 135375.

It is an arithmetic number, because the mean of its divisors is an integer number (6085395).

Almost surely, 2^39216845 is an apocalyptic number.

It is an amenable number.

39216845 is a deficient number, since it is larger than the sum of its proper divisors (9466315).

39216845 is a wasteful number, since it uses less digits than its factorization.

39216845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270495.

The product of its digits is 51840, while the sum is 38.

The square root of 39216845 is about 6262.3354269793. The cubic root of 39216845 is about 339.7485020174.

The spelling of 39216845 in words is "thirty-nine million, two hundred sixteen thousand, eight hundred forty-five".