1428557493 has 16 divisors (see below), whose sum is σ = 2079360000. Its totient is φ = 865184880.

The previous prime is 1428557479. The next prime is 1428557551. The reversal of 1428557493 is 3947558241.

It is not a de Polignac number, because 1428557493 - 2⁴ = 1428557477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428557443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35028 + ... + 63906.

It is an arithmetic number, because the mean of its divisors is an integer number (129960000).

Almost surely, 2^1428557493 is an apocalyptic number.

It is an amenable number.

1428557493 is a deficient number, since it is larger than the sum of its proper divisors (650802507).

1428557493 is a wasteful number, since it uses less digits than its factorization.

1428557493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30392.

The product of its digits is 1209600, while the sum is 48.

The square root of 1428557493 is about 37796.2629501913. The cubic root of 1428557493 is about 1126.2442182865.

The spelling of 1428557493 in words is "one billion, four hundred twenty-eight million, five hundred fifty-seven thousand, four hundred ninety-three".