28996426957 has 2 divisors, whose sum is σ = 28996426958. Its totient is φ = 28996426956.

The previous prime is 28996426937. The next prime is 28996426961. The reversal of 28996426957 is 75962469982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19693631556 + 9302795401 = 140334^2 + 96451^2 .

It is a cyclic number.

It is not a de Polignac number, because 28996426957 - 2²³ = 28988038349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28996426892 and 28996426901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28996426937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14498213478 + 14498213479.

It is an arithmetic number, because the mean of its divisors is an integer number (14498213479).

Almost surely, 2^28996426957 is an apocalyptic number.

It is an amenable number.

28996426957 is a deficient number, since it is larger than the sum of its proper divisors (1).

28996426957 is an equidigital number, since it uses as much as digits as its factorization.

28996426957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 67.

The spelling of 28996426957 in words is "twenty-eight billion, nine hundred ninety-six million, four hundred twenty-six thousand, nine hundred fifty-seven".