39855157 has 16 divisors (see below), whose sum is σ = 43593984. Its totient is φ = 36288000.

The previous prime is 39855139. The next prime is 39855163. The reversal of 39855157 is 75155893.

It is a cyclic number.

It is not a de Polignac number, because 39855157 - 2¹⁵ = 39822389 is a prime.

Its product of digits (189000) is a multiple of the sum of its prime divisors (540).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39855187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146932 + ... + 147202.

It is an arithmetic number, because the mean of its divisors is an integer number (2724624).

Almost surely, 2^39855157 is an apocalyptic number.

It is an amenable number.

39855157 is a deficient number, since it is larger than the sum of its proper divisors (3738827).

39855157 is a wasteful number, since it uses less digits than its factorization.

39855157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540.

The product of its digits is 189000, while the sum is 43.

The square root of 39855157 is about 6313.0940908559. The cubic root of 39855157 is about 341.5818933312.

It can be divided in two parts, 398 and 55157, that added together give a palindrome (55555).

The spelling of 39855157 in words is "thirty-nine million, eight hundred fifty-five thousand, one hundred fifty-seven".