28620003 has 4 divisors (see below), whose sum is σ = 38160008. Its totient is φ = 19080000.

The previous prime is 28619957. The next prime is 28620017. The reversal of 28620003 is 30002682.

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

It is not a de Polignac number, because 28620003 - 2⁶ = 28619939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28620083) 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, 4769998 + ... + 4770003.

It is an arithmetic number, because the mean of its divisors is an integer number (9540002).

Almost surely, 2^28620003 is an apocalyptic number.

28620003 is a deficient number, since it is larger than the sum of its proper divisors (9540005).

28620003 is an equidigital number, since it uses as much as digits as its factorization.

28620003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9540004.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 28620003 is about 5349.7666304242. The cubic root of 28620003 is about 305.8838574144.

Adding to 28620003 its reverse (30002682), we get a palindrome (58622685).

The spelling of 28620003 in words is "twenty-eight million, six hundred twenty thousand, three".