2528889457 has 2 divisors, whose sum is σ = 2528889458. Its totient is φ = 2528889456.

The previous prime is 2528889437. The next prime is 2528889463. The reversal of 2528889457 is 7549888252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2473669696 + 55219761 = 49736^2 + 7431^2 .

It is a cyclic number.

It is not a de Polignac number, because 2528889457 - 2²⁷ = 2394671729 is a prime.

It is not a weakly prime, because it can be changed into another prime (2528889437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1264444728 + 1264444729.

It is an arithmetic number, because the mean of its divisors is an integer number (1264444729).

Almost surely, 2^2528889457 is an apocalyptic number.

It is an amenable number.

2528889457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2528889457 is an equidigital number, since it uses as much as digits as its factorization.

2528889457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12902400, while the sum is 58.

The square root of 2528889457 is about 50288.0647569580. The cubic root of 2528889457 is about 1362.4166692800.

The spelling of 2528889457 in words is "two billion, five hundred twenty-eight million, eight hundred eighty-nine thousand, four hundred fifty-seven".