28433047631 has 2 divisors, whose sum is σ = 28433047632. Its totient is φ = 28433047630.

The previous prime is 28433047613. The next prime is 28433047661. The reversal of 28433047631 is 13674033482.

Together with previous prime (28433047613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28433047631 - 2⁶ = 28433047567 is a prime.

It is a super-2 number, since 2×28433047631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28433047661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14216523815 + 14216523816.

It is an arithmetic number, because the mean of its divisors is an integer number (14216523816).

Almost surely, 2^28433047631 is an apocalyptic number.

28433047631 is a deficient number, since it is larger than the sum of its proper divisors (1).

28433047631 is an equidigital number, since it uses as much as digits as its factorization.

28433047631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 28433047631 in words is "twenty-eight billion, four hundred thirty-three million, forty-seven thousand, six hundred thirty-one".