38243857 has 8 divisors (see below), whose sum is σ = 39259080. Its totient is φ = 37232640.

The previous prime is 38243851. The next prime is 38243861. The reversal of 38243857 is 75834283.

It can be written as a sum of positive squares in 4 ways, for example, as 8202496 + 30041361 = 2864^2 + 5481^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38243857 - 2⁷ = 38243729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38243851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32593 + ... + 33745.

It is an arithmetic number, because the mean of its divisors is an integer number (4907385).

Almost surely, 2^38243857 is an apocalyptic number.

It is an amenable number.

38243857 is a deficient number, since it is larger than the sum of its proper divisors (1015223).

38243857 is a wasteful number, since it uses less digits than its factorization.

38243857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003.

The product of its digits is 161280, while the sum is 40.

The square root of 38243857 is about 6184.1617863701. The cubic root of 38243857 is about 336.9151667702.

The spelling of 38243857 in words is "thirty-eight million, two hundred forty-three thousand, eight hundred fifty-seven".