1622621806 has 16 divisors (see below), whose sum is σ = 2641172688. Its totient is φ = 743184000.

The previous prime is 1622621801. The next prime is 1622621821. The reversal of 1622621806 is 6081262261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622621801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234795 + ... + 241606.

It is an arithmetic number, because the mean of its divisors is an integer number (165073293).

Almost surely, 2^1622621806 is an apocalyptic number.

1622621806 is a deficient number, since it is larger than the sum of its proper divisors (1018550882).

1622621806 is a wasteful number, since it uses less digits than its factorization.

1622621806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476547.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1622621806 is about 40281.7800748676. The cubic root of 1622621806 is about 1175.0935325574.

The spelling of 1622621806 in words is "one billion, six hundred twenty-two million, six hundred twenty-one thousand, eight hundred six".