28637305797 has 4 divisors (see below), whose sum is σ = 38183074400. Its totient is φ = 19091537196.

The previous prime is 28637305777. The next prime is 28637305831. The reversal of 28637305797 is 79750373682.

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 not a de Polignac number, because 28637305797 - 2¹⁴ = 28637289413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28637305747) 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, 4772884297 + ... + 4772884302.

It is an arithmetic number, because the mean of its divisors is an integer number (9545768600).

Almost surely, 2^28637305797 is an apocalyptic number.

It is an amenable number.

28637305797 is a deficient number, since it is larger than the sum of its proper divisors (9545768603).

28637305797 is an equidigital number, since it uses as much as digits as its factorization.

28637305797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9545768602.

The product of its (nonzero) digits is 13335840, while the sum is 57.

The spelling of 28637305797 in words is "twenty-eight billion, six hundred thirty-seven million, three hundred five thousand, seven hundred ninety-seven".