28030277477 has 2 divisors, whose sum is σ = 28030277478. Its totient is φ = 28030277476.

The previous prime is 28030277453. The next prime is 28030277543. The reversal of 28030277477 is 77477203082.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26790815041 + 1239462436 = 163679^2 + 35206^2 .

It is a cyclic number.

It is not a de Polignac number, because 28030277477 - 2⁶ = 28030277413 is a prime.

It is a super-2 number, since 2×28030277477² (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 (28030277417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14015138738 + 14015138739.

It is an arithmetic number, because the mean of its divisors is an integer number (14015138739).

Almost surely, 2^28030277477 is an apocalyptic number.

It is an amenable number.

28030277477 is a deficient number, since it is larger than the sum of its proper divisors (1).

28030277477 is an equidigital number, since it uses as much as digits as its factorization.

28030277477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921984, while the sum is 47.

The spelling of 28030277477 in words is "twenty-eight billion, thirty million, two hundred seventy-seven thousand, four hundred seventy-seven".