28328653641 has 8 divisors (see below), whose sum is σ = 37805357824. Its totient is φ = 18868859280.

The previous prime is 28328653627. The next prime is 28328653667. The reversal of 28328653641 is 14635682382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28328653641 - 2²⁹ = 27791782729 is a prime.

It is a super-2 number, since 2×28328653641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28328613641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4223545 + ... + 4230246.

It is an arithmetic number, because the mean of its divisors is an integer number (4725669728).

Almost surely, 2^28328653641 is an apocalyptic number.

It is an amenable number.

28328653641 is a deficient number, since it is larger than the sum of its proper divisors (9476704183).

28328653641 is a wasteful number, since it uses less digits than its factorization.

28328653641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8454911.

The product of its digits is 1658880, while the sum is 48.

The spelling of 28328653641 in words is "twenty-eight billion, three hundred twenty-eight million, six hundred fifty-three thousand, six hundred forty-one".