39857145 has 8 divisors (see below), whose sum is σ = 63771456. Its totient is φ = 21257136.

The previous prime is 39857123. The next prime is 39857171. The reversal of 39857145 is 54175893.

39857145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 39857145 - 2⁷ = 39857017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39857097 and 39857106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1328557 + ... + 1328586.

It is an arithmetic number, because the mean of its divisors is an integer number (7971432).

Almost surely, 2^39857145 is an apocalyptic number.

It is an amenable number.

39857145 is a deficient number, since it is larger than the sum of its proper divisors (23914311).

39857145 is a wasteful number, since it uses less digits than its factorization.

39857145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657151.

The product of its digits is 151200, while the sum is 42.

The square root of 39857145 is about 6313.2515394209. The cubic root of 39857145 is about 341.5875726758.

The spelling of 39857145 in words is "thirty-nine million, eight hundred fifty-seven thousand, one hundred forty-five".