1621673622 has 128 divisors (see below), whose sum is σ = 3917185920. Its totient is φ = 501645312.

The previous prime is 1621673597. The next prime is 1621673623. The reversal of 1621673622 is 2263761261.

1621673622 is a `hidden beast` number, since 1 + 6 + 21 + 6 + 7 + 3 + 622 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621673623) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 8402358 + ... + 8402550.

It is an arithmetic number, because the mean of its divisors is an integer number (30603015).

Almost surely, 2^1621673622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1621673622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1958592960).

1621673622 is an abundant number, since it is smaller than the sum of its proper divisors (2295512298).

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

1621673622 is a wasteful number, since it uses less digits than its factorization.

1621673622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 328 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 1621673622 is about 40270.0089644887. The cubic root of 1621673622 is about 1174.8645981292.

The spelling of 1621673622 in words is "one billion, six hundred twenty-one million, six hundred seventy-three thousand, six hundred twenty-two".