28481803 has 4 divisors (see below), whose sum is σ = 32550640. Its totient is φ = 24412968.

The previous prime is 28481801. The next prime is 28481807. The reversal of 28481803 is 30818482.

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 28481803 - 2¹ = 28481801 is a prime.

It is a super-2 number, since 2×28481803² = 1622426204261618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28481801) 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, 2034408 + ... + 2034421.

It is an arithmetic number, because the mean of its divisors is an integer number (8137660).

Almost surely, 2^28481803 is an apocalyptic number.

28481803 is a deficient number, since it is larger than the sum of its proper divisors (4068837).

28481803 is an equidigital number, since it uses as much as digits as its factorization.

28481803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4068836.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 28481803 is about 5336.8345486815. The cubic root of 28481803 is about 305.3907131038.

The spelling of 28481803 in words is "twenty-eight million, four hundred eighty-one thousand, eight hundred three".