28212598045 has 4 divisors (see below), whose sum is σ = 33855117660. Its totient is φ = 22570078432.

The previous prime is 28212598019. The next prime is 28212598069. The reversal of 28212598045 is 54089521282.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8275722841 + 19936875204 = 90971^2 + 141198^2 .

It is a cyclic number.

It is not a de Polignac number, because 28212598045 - 2¹⁷ = 28212466973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28212597986 and 28212598004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2821259800 + ... + 2821259809.

It is an arithmetic number, because the mean of its divisors is an integer number (8463779415).

Almost surely, 2^28212598045 is an apocalyptic number.

It is an amenable number.

28212598045 is a deficient number, since it is larger than the sum of its proper divisors (5642519615).

28212598045 is an equidigital number, since it uses as much as digits as its factorization.

28212598045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5642519614.

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 28212598045 in words is "twenty-eight billion, two hundred twelve million, five hundred ninety-eight thousand, forty-five".