1528756428 has 18 divisors (see below), whose sum is σ = 3567414396. Its totient is φ = 509540328.

The previous prime is 1528756423. The next prime is 1528756457. The reversal of 1528756428 is 8246578251.

It is not an unprimeable number, because it can be changed into a prime (1528756421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129801 + ... + 141087.

Almost surely, 2^1528756428 is an apocalyptic number.

It is an amenable number.

1528756428 is an abundant number, since it is smaller than the sum of its proper divisors (2038657968).

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

1528756428 is an frugal number, since it uses more digits than its factorization.

1528756428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22581 (or 11292 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 48.

The square root of 1528756428 is about 39099.3149300598. The cubic root of 1528756428 is about 1151.9830756821.

Multiplying 1528756428 by its sum of digits (48), we get a square (73380308544 = 270888²).

The spelling of 1528756428 in words is "one billion, five hundred twenty-eight million, seven hundred fifty-six thousand, four hundred twenty-eight".