28321051493 has 16 divisors (see below), whose sum is σ = 32449872000. Its totient is φ = 24213059136.

The previous prime is 28321051489. The next prime is 28321051501. The reversal of 28321051493 is 39415012382.

It is not a de Polignac number, because 28321051493 - 2² = 28321051489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28321051463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4923383 + ... + 4929131.

It is an arithmetic number, because the mean of its divisors is an integer number (2028117000).

Almost surely, 2^28321051493 is an apocalyptic number.

It is an amenable number.

28321051493 is a deficient number, since it is larger than the sum of its proper divisors (4128820507).

28321051493 is an equidigital number, since it uses as much as digits as its factorization.

28321051493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7436.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 28321051493 in words is "twenty-eight billion, three hundred twenty-one million, fifty-one thousand, four hundred ninety-three".