28783004473 has 2 divisors, whose sum is σ = 28783004474. Its totient is φ = 28783004472.

The previous prime is 28783004461. The next prime is 28783004477. The reversal of 28783004473 is 37440038782.

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., 22336199209 + 6446805264 = 149453^2 + 80292^2 .

It is a cyclic number.

It is not a de Polignac number, because 28783004473 - 2⁹ = 28783003961 is a prime.

It is a super-2 number, since 2×28783004473² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28783004477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14391502236 + 14391502237.

It is an arithmetic number, because the mean of its divisors is an integer number (14391502237).

Almost surely, 2^28783004473 is an apocalyptic number.

It is an amenable number.

28783004473 is a deficient number, since it is larger than the sum of its proper divisors (1).

28783004473 is an equidigital number, since it uses as much as digits as its factorization.

28783004473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 28783004473 in words is "twenty-eight billion, seven hundred eighty-three million, four thousand, four hundred seventy-three".