1530278020 has 12 divisors (see below), whose sum is σ = 3213583884. Its totient is φ = 612111200.

The previous prime is 1530278011. The next prime is 1530278039. The reversal of 1530278020 is 208720351.

It can be written as a sum of positive squares in 2 ways, for example, as 964599364 + 565678656 = 31058^2 + 23784^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1530278020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38256931 + ... + 38256970.

It is an arithmetic number, because the mean of its divisors is an integer number (267798657).

Almost surely, 2^1530278020 is an apocalyptic number.

1530278020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1530278020 is an abundant number, since it is smaller than the sum of its proper divisors (1683305864).

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

1530278020 is a wasteful number, since it uses less digits than its factorization.

1530278020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76513910 (or 76513908 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1530278020 is about 39118.7681298888. The cubic root of 1530278020 is about 1152.3651437423.

Adding to 1530278020 its reverse (208720351), we get a palindrome (1738998371).

The spelling of 1530278020 in words is "one billion, five hundred thirty million, two hundred seventy-eight thousand, twenty".