1428720507508 has 24 divisors (see below), whose sum is σ = 2857471166144. Its totient is φ = 612302328000.

The previous prime is 1428720507469. The next prime is 1428720507541. The reversal of 1428720507508 is 8057050278241.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3229483 + ... + 3645133.

Almost surely, 2^{1428720507508} is an apocalyptic number.

It is an amenable number.

1428720507508 is an abundant number, since it is smaller than the sum of its proper divisors (1428750658636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1428720507508 is a wasteful number, since it uses less digits than its factorization.

1428720507508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538423 (or 538421 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 49.

The spelling of 1428720507508 in words is "one trillion, four hundred twenty-eight billion, seven hundred twenty million, five hundred seven thousand, five hundred eight".