1530561380 has 24 divisors (see below), whose sum is σ = 3217015032. Its totient is φ = 611684352.

The previous prime is 1530561377. The next prime is 1530561407. The reversal of 1530561380 is 831650351.

It can be written as a sum of positive squares in 4 ways, for example, as 786690304 + 743871076 = 28048^2 + 27274^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10127 + ... + 56246.

It is an arithmetic number, because the mean of its divisors is an integer number (134042293).

Almost surely, 2^1530561380 is an apocalyptic number.

1530561380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1530561380 is an abundant number, since it is smaller than the sum of its proper divisors (1686453652).

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

1530561380 is a wasteful number, since it uses less digits than its factorization.

1530561380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67535 (or 67533 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1530561380 is about 39122.3897531835. The cubic root of 1530561380 is about 1152.4362667736.

The spelling of 1530561380 in words is "one billion, five hundred thirty million, five hundred sixty-one thousand, three hundred eighty".