28002500305 has 16 divisors (see below), whose sum is σ = 36539193600. Its totient is φ = 20477999808.

The previous prime is 28002500303. The next prime is 28002500329. The reversal of 28002500305 is 50300520082.

It is a cyclic number.

It is not a de Polignac number, because 28002500305 - 2¹ = 28002500303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28002500305.

It is not an unprimeable number, because it can be changed into a prime (28002500303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2084605 + ... + 2097994.

It is an arithmetic number, because the mean of its divisors is an integer number (2283699600).

Almost surely, 2^28002500305 is an apocalyptic number.

It is an amenable number.

28002500305 is a deficient number, since it is larger than the sum of its proper divisors (8536693295).

28002500305 is a wasteful number, since it uses less digits than its factorization.

28002500305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182720.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 28002500305 in words is "twenty-eight billion, two million, five hundred thousand, three hundred five".