39686145 has 8 divisors (see below), whose sum is σ = 63497856. Its totient is φ = 21165936.

The previous prime is 39686113. The next prime is 39686149. The reversal of 39686145 is 54168693.

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

It is not a de Polignac number, because 39686145 - 2⁵ = 39686113 is a prime.

It is a super-2 number, since 2×39686145² = 3149980209922050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39686097 and 39686106.

It is not an unprimeable number, because it can be changed into a prime (39686149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1322857 + ... + 1322886.

It is an arithmetic number, because the mean of its divisors is an integer number (7937232).

Almost surely, 2^39686145 is an apocalyptic number.

It is an amenable number.

39686145 is a deficient number, since it is larger than the sum of its proper divisors (23811711).

39686145 is a wasteful number, since it uses less digits than its factorization.

39686145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645751.

The product of its digits is 155520, while the sum is 42.

The square root of 39686145 is about 6299.6940401896. The cubic root of 39686145 is about 341.0983654559.

The spelling of 39686145 in words is "thirty-nine million, six hundred eighty-six thousand, one hundred forty-five".