28649867801 has 8 divisors (see below), whose sum is σ = 30160884000. Its totient is φ = 27139164480.

The previous prime is 28649867777. The next prime is 28649867809. The reversal of 28649867801 is 10876894682.

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

It is a cyclic number.

It is not a de Polignac number, because 28649867801 - 2⁶ = 28649867737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28649867809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123050 + ... + 269148.

It is an arithmetic number, because the mean of its divisors is an integer number (3770110500).

Almost surely, 2^28649867801 is an apocalyptic number.

It is an amenable number.

28649867801 is a deficient number, since it is larger than the sum of its proper divisors (1511016199).

28649867801 is a wasteful number, since it uses less digits than its factorization.

28649867801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156439.

The product of its (nonzero) digits is 9289728, while the sum is 59.

The spelling of 28649867801 in words is "twenty-eight billion, six hundred forty-nine million, eight hundred sixty-seven thousand, eight hundred one".