28005002 has 4 divisors (see below), whose sum is σ = 42007506. Its totient is φ = 14002500.

The previous prime is 28004987. The next prime is 28005011. The reversal of 28005002 is 20050082.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 24314761 + 3690241 = 4931^2 + 1921^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7001249 + ... + 7001252.

Almost surely, 2^28005002 is an apocalyptic number.

28005002 is a deficient number, since it is larger than the sum of its proper divisors (14002504).

28005002 is a wasteful number, since it uses less digits than its factorization.

28005002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14002503.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 28005002 is about 5291.9752455959. The cubic root of 28005002 is about 303.6769782753.

Adding to 28005002 its reverse (20050082), we get a palindrome (48055084).

The spelling of 28005002 in words is "twenty-eight million, five thousand, two".