10863855 has 16 divisors (see below), whose sum is σ = 19313760. Its totient is φ = 5793984.

The previous prime is 10863841. The next prime is 10863859. The reversal of 10863855 is 55836801.

10863855 is a `hidden beast` number, since 10 + 8 + 638 + 5 + 5 = 666.

It is not a de Polignac number, because 10863855 - 2⁶ = 10863791 is a prime.

It is a super-2 number, since 2×10863855² = 236046690922050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10863859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40102 + ... + 40371.

It is an arithmetic number, because the mean of its divisors is an integer number (1207110).

Almost surely, 2^10863855 is an apocalyptic number.

10863855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10863855 is a deficient number, since it is larger than the sum of its proper divisors (8449905).

10863855 is an equidigital number, since it uses as much as digits as its factorization.

10863855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80487 (or 80481 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 10863855 is about 3296.0362558686. The cubic root of 10863855 is about 221.4766708848.

The spelling of 10863855 in words is "ten million, eight hundred sixty-three thousand, eight hundred fifty-five".