1620603204 has 24 divisors (see below), whose sum is σ = 4125172128. Its totient is φ = 491091840.

The previous prime is 1620603203. The next prime is 1620603211. The reversal of 1620603204 is 4023060261.

It is not an unprimeable number, because it can be changed into a prime (1620603203) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6138517 + ... + 6138780.

It is an arithmetic number, because the mean of its divisors is an integer number (171882172).

Almost surely, 2^1620603204 is an apocalyptic number.

It is an amenable number.

1620603204 is an abundant number, since it is smaller than the sum of its proper divisors (2504568924).

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

1620603204 is a wasteful number, since it uses less digits than its factorization.

1620603204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12277315 (or 12277313 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1620603204 is about 40256.7162595262. The cubic root of 1620603204 is about 1174.6060436337.

Adding to 1620603204 its reverse (4023060261), we get a palindrome (5643663465).

The spelling of 1620603204 in words is "one billion, six hundred twenty million, six hundred three thousand, two hundred four".