1620382404 has 96 divisors (see below), whose sum is σ = 4106059776. Its totient is φ = 495475200.

The previous prime is 1620382397. The next prime is 1620382417. The reversal of 1620382404 is 4042830261.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1407229 + ... + 1408379.

It is an arithmetic number, because the mean of its divisors is an integer number (42771456).

Almost surely, 2^1620382404 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 1620382404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2053029888).

1620382404 is an abundant number, since it is smaller than the sum of its proper divisors (2485677372).

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

1620382404 is a wasteful number, since it uses less digits than its factorization.

1620382404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1343 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1620382404 is about 40253.9737665737. The cubic root of 1620382404 is about 1174.5526962560.

The spelling of 1620382404 in words is "one billion, six hundred twenty million, three hundred eighty-two thousand, four hundred four".