28821746731 has 2 divisors, whose sum is σ = 28821746732. Its totient is φ = 28821746730.

The previous prime is 28821746717. The next prime is 28821746747. The reversal of 28821746731 is 13764712882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28821746731 - 2²⁵ = 28788192299 is a prime.

It is a super-2 number, since 2×28821746731² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28821746771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14410873365 + 14410873366.

It is an arithmetic number, because the mean of its divisors is an integer number (14410873366).

Almost surely, 2^28821746731 is an apocalyptic number.

28821746731 is a deficient number, since it is larger than the sum of its proper divisors (1).

28821746731 is an equidigital number, since it uses as much as digits as its factorization.

28821746731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 49.

The spelling of 28821746731 in words is "twenty-eight billion, eight hundred twenty-one million, seven hundred forty-six thousand, seven hundred thirty-one".