1622666856 has 64 divisors (see below), whose sum is σ = 4148484480. Its totient is φ = 528756480.

The previous prime is 1622666819. The next prime is 1622666863. The reversal of 1622666856 is 6586662261.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

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 15 ways as a sum of consecutive naturals, for example, 241170 + ... + 247806.

It is an arithmetic number, because the mean of its divisors is an integer number (64820070).

Almost surely, 2^1622666856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1622666856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074242240).

1622666856 is an abundant number, since it is smaller than the sum of its proper divisors (2525817624).

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

1622666856 is a wasteful number, since it uses less digits than its factorization.

1622666856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6874 (or 6870 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The square root of 1622666856 is about 40282.3392568009. The cubic root of 1622666856 is about 1175.1044074418.

The spelling of 1622666856 in words is "one billion, six hundred twenty-two million, six hundred sixty-six thousand, eight hundred fifty-six".