28893307444649 has 8 divisors (see below), whose sum is σ = 30169813651200. Its totient is φ = 27618490858816.

The previous prime is 28893307444543. The next prime is 28893307444679. The reversal of 28893307444649 is 94644470339882.

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 28893307444649 - 2¹² = 28893307440553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28893307444679) 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, 422370224 + ... + 422438625.

It is an arithmetic number, because the mean of its divisors is an integer number (3771226706400).

Almost surely, 2^{28893307444649} is an apocalyptic number.

It is an amenable number.

28893307444649 is a deficient number, since it is larger than the sum of its proper divisors (1276506206551).

28893307444649 is a wasteful number, since it uses less digits than its factorization.

28893307444649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844810359.

The product of its (nonzero) digits is 1003290624, while the sum is 71.

The spelling of 28893307444649 in words is "twenty-eight trillion, eight hundred ninety-three billion, three hundred seven million, four hundred forty-four thousand, six hundred forty-nine".