1528289772 has 12 divisors (see below), whose sum is σ = 3566009496. Its totient is φ = 509429920.

The previous prime is 1528289771. The next prime is 1528289813. The reversal of 1528289772 is 2779828251.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1528289771) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 63678729 + ... + 63678752.

It is an arithmetic number, because the mean of its divisors is an integer number (297167458).

Almost surely, 2^1528289772 is an apocalyptic number.

1528289772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1528289772 is an abundant number, since it is smaller than the sum of its proper divisors (2037719724).

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

1528289772 is a wasteful number, since it uses less digits than its factorization.

1528289772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127357488 (or 127357486 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 51.

The square root of 1528289772 is about 39093.3469019986. The cubic root of 1528289772 is about 1151.8658486967.

The spelling of 1528289772 in words is "one billion, five hundred twenty-eight million, two hundred eighty-nine thousand, seven hundred seventy-two".