387855011 has 4 divisors (see below), whose sum is σ = 388059672. Its totient is φ = 387650352.

The previous prime is 387855001. The next prime is 387855023. The reversal of 387855011 is 110558783.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 387855011 - 2¹⁸ = 387592867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387855001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99461 + ... + 103286.

It is an arithmetic number, because the mean of its divisors is an integer number (97014918).

Almost surely, 2^387855011 is an apocalyptic number.

387855011 is a deficient number, since it is larger than the sum of its proper divisors (204661).

387855011 is a wasteful number, since it uses less digits than its factorization.

387855011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204660.

The product of its (nonzero) digits is 33600, while the sum is 38.

The square root of 387855011 is about 19694.0349090784. The cubic root of 387855011 is about 729.2724414382.

The spelling of 387855011 in words is "three hundred eighty-seven million, eight hundred fifty-five thousand, eleven".