1620354004 has 24 divisors (see below), whose sum is σ = 3028032000. Its totient is φ = 757004640.

The previous prime is 1620353957. The next prime is 1620354007. The reversal of 1620354004 is 4004530261.

It is a self number, because there is not a number n which added to its sum of digits gives 1620354004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620354007) 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 7 ways as a sum of consecutive naturals, for example, 221704 + ... + 228895.

It is an arithmetic number, because the mean of its divisors is an integer number (126168000).

Almost surely, 2^1620354004 is an apocalyptic number.

It is an amenable number.

1620354004 is a deficient number, since it is larger than the sum of its proper divisors (1407677996).

1620354004 is a wasteful number, since it uses less digits than its factorization.

1620354004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450663 (or 450661 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1620354004 is about 40253.6210048239. The cubic root of 1620354004 is about 1174.5458341944.

Adding to 1620354004 its reverse (4004530261), we get a palindrome (5624884265).

It can be divided in two parts, 16203 and 54004, that added together give a palindrome (70207).

The spelling of 1620354004 in words is "one billion, six hundred twenty million, three hundred fifty-four thousand, four".