1566244728 has 64 divisors (see below), whose sum is σ = 4451884800. Its totient is φ = 509937120.

The previous prime is 1566244721. The next prime is 1566244747. The reversal of 1566244728 is 8274426651.

1566244728 is a `hidden beast` number, since 1 + 566 + 24 + 47 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566244721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75028 + ... + 93603.

It is an arithmetic number, because the mean of its divisors is an integer number (69560700).

Almost surely, 2^1566244728 is an apocalyptic number.

1566244728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1566244728 is an abundant number, since it is smaller than the sum of its proper divisors (2885640072).

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

1566244728 is a wasteful number, since it uses less digits than its factorization.

1566244728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168689 (or 168679 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 1566244728 is about 39575.8098843220. The cubic root of 1566244728 is about 1161.3234814958.

The spelling of 1566244728 in words is "one billion, five hundred sixty-six million, two hundred forty-four thousand, seven hundred twenty-eight".