1028888249 has 2 divisors, whose sum is σ = 1028888250. Its totient is φ = 1028888248.

The previous prime is 1028888239. The next prime is 1028888261. The reversal of 1028888249 is 9428888201.

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., 1026049024 + 2839225 = 32032^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028888249 - 2¹⁶ = 1028822713 is a prime.

It is a super-2 number, since 2×1028888249² = 2117222057860572002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1028888197 and 1028888206.

It is not a weakly prime, because it can be changed into another prime (1028888239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514444124 + 514444125.

It is an arithmetic number, because the mean of its divisors is an integer number (514444125).

Almost surely, 2^1028888249 is an apocalyptic number.

It is an amenable number.

1028888249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028888249 is an equidigital number, since it uses as much as digits as its factorization.

1028888249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 589824, while the sum is 50.

The square root of 1028888249 is about 32076.2879554352. The cubic root of 1028888249 is about 1009.5381507647.

The spelling of 1028888249 in words is "one billion, twenty-eight million, eight hundred eighty-eight thousand, two hundred forty-nine".