28839015493 has 2 divisors, whose sum is σ = 28839015494. Its totient is φ = 28839015492.

The previous prime is 28839015473. The next prime is 28839015547. The reversal of 28839015493 is 39451093882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15645506724 + 13193508769 = 125082^2 + 114863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28839015493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28839015493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28839015433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14419507746 + 14419507747.

It is an arithmetic number, because the mean of its divisors is an integer number (14419507747).

Almost surely, 2^28839015493 is an apocalyptic number.

It is an amenable number.

28839015493 is a deficient number, since it is larger than the sum of its proper divisors (1).

28839015493 is an equidigital number, since it uses as much as digits as its factorization.

28839015493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 28839015493 in words is "twenty-eight billion, eight hundred thirty-nine million, fifteen thousand, four hundred ninety-three".