28180963 has 4 divisors (see below), whose sum is σ = 28643008. Its totient is φ = 27718920.

The previous prime is 28180931. The next prime is 28180967. The reversal of 28180963 is 36908182.

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 28180963 - 2⁵ = 28180931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28180967) 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, 230931 + ... + 231052.

It is an arithmetic number, because the mean of its divisors is an integer number (7160752).

Almost surely, 2^28180963 is an apocalyptic number.

28180963 is a deficient number, since it is larger than the sum of its proper divisors (462045).

28180963 is an equidigital number, since it uses as much as digits as its factorization.

28180963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462044.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28180963 is about 5308.5744790857. The cubic root of 28180963 is about 304.3116717837.

The spelling of 28180963 in words is "twenty-eight million, one hundred eighty thousand, nine hundred sixty-three".