1428306243 has 48 divisors (see below), whose sum is σ = 2407980960. Its totient is φ = 746371584.

The previous prime is 1428306239. The next prime is 1428306251. The reversal of 1428306243 is 3426038241.

It is not a de Polignac number, because 1428306243 - 2² = 1428306239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1428306223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204871 + ... + 211727.

It is an arithmetic number, because the mean of its divisors is an integer number (50166270).

Almost surely, 2^1428306243 is an apocalyptic number.

1428306243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1428306243 is a deficient number, since it is larger than the sum of its proper divisors (979674717).

1428306243 is a wasteful number, since it uses less digits than its factorization.

1428306243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996 (or 6989 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 1428306243 is about 37792.9390627403. The cubic root of 1428306243 is about 1126.1781877039.

The spelling of 1428306243 in words is "one billion, four hundred twenty-eight million, three hundred six thousand, two hundred forty-three".