1560720900 has 144 divisors (see below), whose sum is σ = 4597705728. Its totient is φ = 408720000.

The previous prime is 1560720859. The next prime is 1560720937. The reversal of 1560720900 is 90270651.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 47 ways as a sum of consecutive naturals, for example, 5934169 + ... + 5934431.

It is an arithmetic number, because the mean of its divisors is an integer number (31928512).

Almost surely, 2^1560720900 is an apocalyptic number.

1560720900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1560720900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2298852864).

1560720900 is an abundant number, since it is smaller than the sum of its proper divisors (3036984828).

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

1560720900 is a wasteful number, since it uses less digits than its factorization.

1560720900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 1560720900 is about 39505.9603098064. The cubic root of 1560720900 is about 1159.9566224366.

The spelling of 1560720900 in words is "one billion, five hundred sixty million, seven hundred twenty thousand, nine hundred".