1528365220 has 12 divisors (see below), whose sum is σ = 3209567004. Its totient is φ = 611346080.

The previous prime is 1528365217. The next prime is 1528365257. The reversal of 1528365220 is 225638251.

It can be written as a sum of positive squares in 2 ways, for example, as 273505444 + 1254859776 = 16538^2 + 35424^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38209111 + ... + 38209150.

It is an arithmetic number, because the mean of its divisors is an integer number (267463917).

Almost surely, 2^1528365220 is an apocalyptic number.

1528365220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1528365220 is an abundant number, since it is smaller than the sum of its proper divisors (1681201784).

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

1528365220 is a wasteful number, since it uses less digits than its factorization.

1528365220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76418270 (or 76418268 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1528365220 is about 39094.3118624692. The cubic root of 1528365220 is about 1151.8848033361.

The spelling of 1528365220 in words is "one billion, five hundred twenty-eight million, three hundred sixty-five thousand, two hundred twenty".