39855457 has 6 divisors (see below), whose sum is σ = 40329254. Its totient is φ = 39383040.

The previous prime is 39855449. The next prime is 39855479. The reversal of 39855457 is 75455893.

It can be written as a sum of positive squares in 3 ways, for example, as 21911761 + 17943696 = 4681^2 + 4236^2 .

It is not a de Polignac number, because 39855457 - 2³ = 39855449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39855437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61857 + ... + 62497.

Almost surely, 2^39855457 is an apocalyptic number.

It is an amenable number.

39855457 is a deficient number, since it is larger than the sum of its proper divisors (473797).

39855457 is an frugal number, since it uses more digits than its factorization.

39855457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379 (or 738 counting only the distinct ones).

The product of its digits is 756000, while the sum is 46.

The square root of 39855457 is about 6313.1178509513. The cubic root of 39855457 is about 341.5827503872.

It can be divided in two parts, 398 and 55457, that added together give a palindrome (55855).

The spelling of 39855457 in words is "thirty-nine million, eight hundred fifty-five thousand, four hundred fifty-seven".