28008325778025 has 48 divisors (see below), whose sum is σ = 47438486867520. Its totient is φ = 14572839705600.

The previous prime is 28008325777987. The next prime is 28008325778053. The reversal of 28008325778025 is 52087752380082.

It is not a de Polignac number, because 28008325778025 - 2¹¹ = 28008325775977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80400421 + ... + 80748029.

It is an arithmetic number, because the mean of its divisors is an integer number (988301809740).

Almost surely, 2^{28008325778025} is an apocalyptic number.

28008325778025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28008325778025 is a deficient number, since it is larger than the sum of its proper divisors (19430161089495).

28008325778025 is a wasteful number, since it uses less digits than its factorization.

28008325778025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373866 (or 373861 counting only the distinct ones).

The product of its (nonzero) digits is 15052800, while the sum is 57.

The spelling of 28008325778025 in words is "twenty-eight trillion, eight billion, three hundred twenty-five million, seven hundred seventy-eight thousand, twenty-five".