28944597631 has 2 divisors, whose sum is σ = 28944597632. Its totient is φ = 28944597630.

The previous prime is 28944597623. The next prime is 28944597691. The reversal of 28944597631 is 13679544982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28944597631 - 2³ = 28944597623 is a prime.

It is a super-2 number, since 2×28944597631² (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 (28944597691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14472298815 + 14472298816.

It is an arithmetic number, because the mean of its divisors is an integer number (14472298816).

Almost surely, 2^28944597631 is an apocalyptic number.

28944597631 is a deficient number, since it is larger than the sum of its proper divisors (1).

28944597631 is an equidigital number, since it uses as much as digits as its factorization.

28944597631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 58.

The spelling of 28944597631 in words is "twenty-eight billion, nine hundred forty-four million, five hundred ninety-seven thousand, six hundred thirty-one".