11387857 has 8 divisors (see below), whose sum is σ = 12295080. Its totient is φ = 10485120.

The previous prime is 11387837. The next prime is 11387861. The reversal of 11387857 is 75878311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2531281 + 8856576 = 1591^2 + 2976^2 .

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 11387857 - 2⁷ = 11387729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11387837) 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 7 ways as a sum of consecutive naturals, for example, 5757 + ... + 7477.

It is an arithmetic number, because the mean of its divisors is an integer number (1536885).

Almost surely, 2^11387857 is an apocalyptic number.

It is an amenable number.

11387857 is a deficient number, since it is larger than the sum of its proper divisors (907223).

11387857 is a wasteful number, since it uses less digits than its factorization.

11387857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243.

The product of its digits is 47040, while the sum is 40.

The square root of 11387857 is about 3374.5899010102. The cubic root of 11387857 is about 224.9817730091.

The spelling of 11387857 in words is "eleven million, three hundred eighty-seven thousand, eight hundred fifty-seven".