1622728556 has 12 divisors (see below), whose sum is σ = 2840281080. Its totient is φ = 811219680.

The previous prime is 1622728469. The next prime is 1622728561. The reversal of 1622728556 is 6558272261.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8561 + ... + 57608.

It is an arithmetic number, because the mean of its divisors is an integer number (236690090).

Almost surely, 2^1622728556 is an apocalyptic number.

It is an amenable number.

1622728556 is a deficient number, since it is larger than the sum of its proper divisors (1217552524).

1622728556 is a wasteful number, since it uses less digits than its factorization.

1622728556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72304 (or 72302 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The square root of 1622728556 is about 40283.1050938231. The cubic root of 1622728556 is about 1175.1193012410.

The spelling of 1622728556 in words is "one billion, six hundred twenty-two million, seven hundred twenty-eight thousand, five hundred fifty-six".