1886628449 has 2 divisors, whose sum is σ = 1886628450. Its totient is φ = 1886628448.

The previous prime is 1886628377. The next prime is 1886628479. The reversal of 1886628449 is 9448266881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 964413025 + 922215424 = 31055^2 + 30368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1886628449 is a prime.

It is a super-2 number, since 2×1886628449² = 7118733809152291202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1886628394 and 1886628403.

It is not a weakly prime, because it can be changed into another prime (1886628479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 943314224 + 943314225.

It is an arithmetic number, because the mean of its divisors is an integer number (943314225).

Almost surely, 2^1886628449 is an apocalyptic number.

It is an amenable number.

1886628449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1886628449 is an equidigital number, since it uses as much as digits as its factorization.

1886628449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5308416, while the sum is 56.

The square root of 1886628449 is about 43435.3364094259. The cubic root of 1886628449 is about 1235.6499606184.

The spelling of 1886628449 in words is "one billion, eight hundred eighty-six million, six hundred twenty-eight thousand, four hundred forty-nine".