28003125306 has 32 divisors (see below), whose sum is σ = 60358330368. Its totient is φ = 8610073920.

The previous prime is 28003125239. The next prime is 28003125317. The reversal of 28003125306 is 60352130082.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22266 + ... + 237701.

It is an arithmetic number, because the mean of its divisors is an integer number (1886197824).

Almost surely, 2^28003125306 is an apocalyptic number.

28003125306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28003125306 is an abundant number, since it is smaller than the sum of its proper divisors (32355205062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28003125306 is a wasteful number, since it uses less digits than its factorization.

28003125306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261366.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 28003125306 its reverse (60352130082), we get a palindrome (88355255388).

The spelling of 28003125306 in words is "twenty-eight billion, three million, one hundred twenty-five thousand, three hundred six".