28298203537 has 4 divisors (see below), whose sum is σ = 28696769856. Its totient is φ = 27899637220.

The previous prime is 28298203511. The next prime is 28298203559. The reversal of 28298203537 is 73530289282.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28298203537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28298203837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199283053 + ... + 199283194.

It is an arithmetic number, because the mean of its divisors is an integer number (7174192464).

Almost surely, 2^28298203537 is an apocalyptic number.

It is an amenable number.

28298203537 is a deficient number, since it is larger than the sum of its proper divisors (398566319).

28298203537 is an equidigital number, since it uses as much as digits as its factorization.

28298203537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398566318.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 28298203537 in words is "twenty-eight billion, two hundred ninety-eight million, two hundred three thousand, five hundred thirty-seven".