1428728611 has 2 divisors, whose sum is σ = 1428728612. Its totient is φ = 1428728610.

The previous prime is 1428728563. The next prime is 1428728633. The reversal of 1428728611 is 1168278241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1428728611 - 2¹⁵ = 1428695843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1428728711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714364305 + 714364306.

It is an arithmetic number, because the mean of its divisors is an integer number (714364306).

Almost surely, 2^1428728611 is an apocalyptic number.

1428728611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428728611 is an equidigital number, since it uses as much as digits as its factorization.

1428728611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 40.

The square root of 1428728611 is about 37798.5265718123. The cubic root of 1428728611 is about 1126.2891850834.

The spelling of 1428728611 in words is "one billion, four hundred twenty-eight million, seven hundred twenty-eight thousand, six hundred eleven".