38705557 has 4 divisors (see below), whose sum is σ = 42224256. Its totient is φ = 35186860.

The previous prime is 38705539. The next prime is 38705567. The reversal of 38705557 is 75550783.

38705557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38705557 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38705567) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1759333 + ... + 1759354.

It is an arithmetic number, because the mean of its divisors is an integer number (10556064).

Almost surely, 2^38705557 is an apocalyptic number.

It is an amenable number.

38705557 is a deficient number, since it is larger than the sum of its proper divisors (3518699).

38705557 is a wasteful number, since it uses less digits than its factorization.

38705557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518698.

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 38705557 is about 6221.3790271932. The cubic root of 38705557 is about 338.2655528975.

The spelling of 38705557 in words is "thirty-eight million, seven hundred five thousand, five hundred fifty-seven".