1428728572 has 6 divisors (see below), whose sum is σ = 2500275008. Its totient is φ = 714364284.

The previous prime is 1428728563. The next prime is 1428728611. The reversal of 1428728572 is 2758278241.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178591068 + ... + 178591075.

Almost surely, 2^1428728572 is an apocalyptic number.

It is an amenable number.

1428728572 is a deficient number, since it is larger than the sum of its proper divisors (1071546436).

1428728572 is a wasteful number, since it uses less digits than its factorization.

1428728572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357182147 (or 357182145 counting only the distinct ones).

The product of its digits is 501760, while the sum is 46.

The square root of 1428728572 is about 37798.5260559192. The cubic root of 1428728572 is about 1126.2891748353.

The spelling of 1428728572 in words is "one billion, four hundred twenty-eight million, seven hundred twenty-eight thousand, five hundred seventy-two".