39381057 has 6 divisors (see below), whose sum is σ = 56883762. Its totient is φ = 26254032.

The previous prime is 39381047. The next prime is 39381079. The reversal of 39381057 is 75018393.

It can be written as a sum of positive squares in only one way, i.e., 21538881 + 17842176 = 4641^2 + 4224^2 .

It is not a de Polignac number, because 39381057 - 2⁸ = 39380801 is a prime.

It is a super-3 number, since 3×39381057³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (39381047) 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, 2187828 + ... + 2187845.

It is an arithmetic number, because the mean of its divisors is an integer number (9480627).

Almost surely, 2^39381057 is an apocalyptic number.

It is an amenable number.

39381057 is a deficient number, since it is larger than the sum of its proper divisors (17502705).

39381057 is a wasteful number, since it uses less digits than its factorization.

39381057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4375679 (or 4375676 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 39381057 is about 6275.4328137587. The cubic root of 39381057 is about 340.2220492994. Note that the first 3 decimals are identical.

The spelling of 39381057 in words is "thirty-nine million, three hundred eighty-one thousand, fifty-seven".