28538021701 has 4 divisors (see below), whose sum is σ = 32614881952. Its totient is φ = 24461161452.

The previous prime is 28538021693. The next prime is 28538021711. The reversal of 28538021701 is 10712083582.

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 28538021701 - 2³ = 28538021693 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 (28538021711) 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, 2038430115 + ... + 2038430128.

It is an arithmetic number, because the mean of its divisors is an integer number (8153720488).

Almost surely, 2^28538021701 is an apocalyptic number.

It is an amenable number.

28538021701 is a deficient number, since it is larger than the sum of its proper divisors (4076860251).

28538021701 is an equidigital number, since it uses as much as digits as its factorization.

28538021701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4076860250.

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 28538021701 in words is "twenty-eight billion, five hundred thirty-eight million, twenty-one thousand, seven hundred one".