28100063 has 4 divisors (see below), whose sum is σ = 28455840. Its totient is φ = 27744288.

The previous prime is 28100041. The next prime is 28100141. The reversal of 28100063 is 36000182.

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 28100063 - 2⁶ = 28099999 is a prime.

It is a super-2 number, since 2×28100063² = 1579227081207938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28108063) 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, 177770 + ... + 177927.

It is an arithmetic number, because the mean of its divisors is an integer number (7113960).

Almost surely, 2^28100063 is an apocalyptic number.

28100063 is a deficient number, since it is larger than the sum of its proper divisors (355777).

28100063 is an equidigital number, since it uses as much as digits as its factorization.

28100063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355776.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 28100063 is about 5300.9492546147. The cubic root of 28100063 is about 304.0201935743.

The spelling of 28100063 in words is "twenty-eight million, one hundred thousand, sixty-three".