39157905 has 16 divisors (see below), whose sum is σ = 62769024. Its totient is φ = 20845440.

The previous prime is 39157903. The next prime is 39157939. The reversal of 39157905 is 50975193.

It is not a de Polignac number, because 39157905 - 2¹ = 39157903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39157903) 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, 7140 + ... + 11370.

It is an arithmetic number, because the mean of its divisors is an integer number (3923064).

Almost surely, 2^39157905 is an apocalyptic number.

It is an amenable number.

39157905 is a deficient number, since it is larger than the sum of its proper divisors (23611119).

39157905 is a wasteful number, since it uses less digits than its factorization.

39157905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4856.

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 39157905 is about 6257.6277454000. The cubic root of 39157905 is about 339.5782111045.

It can be divided in two parts, 39 and 157905, that multiplied together give a triangular number (6158295 = T₃₅₀₉).

The spelling of 39157905 in words is "thirty-nine million, one hundred fifty-seven thousand, nine hundred five".