28377363857 has 2 divisors, whose sum is σ = 28377363858. Its totient is φ = 28377363856.

The previous prime is 28377363809. The next prime is 28377363887. The reversal of 28377363857 is 75836377382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28375065601 + 2298256 = 168449^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 28377363857 - 2¹⁴ = 28377347473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28377363796 and 28377363805.

It is not a weakly prime, because it can be changed into another prime (28377363887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14188681928 + 14188681929.

It is an arithmetic number, because the mean of its divisors is an integer number (14188681929).

Almost surely, 2^28377363857 is an apocalyptic number.

It is an amenable number.

28377363857 is a deficient number, since it is larger than the sum of its proper divisors (1).

28377363857 is an equidigital number, since it uses as much as digits as its factorization.

28377363857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35562240, while the sum is 59.

The spelling of 28377363857 in words is "twenty-eight billion, three hundred seventy-seven million, three hundred sixty-three thousand, eight hundred fifty-seven".