1620085504 has 18 divisors (see below), whose sum is σ = 3233843060. Its totient is φ = 810042624.

The previous prime is 1620085487. The next prime is 1620085517. The reversal of 1620085504 is 4055800261.

It is a pancake number, because a pancake can be divided into 1620085504 parts by 56922 straight cuts.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3163974 + ... + 3164485.

Almost surely, 2^1620085504 is an apocalyptic number.

It is an amenable number.

1620085504 is a deficient number, since it is larger than the sum of its proper divisors (1613757556).

1620085504 is an frugal number, since it uses more digits than its factorization.

1620085504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6328475 (or 6328461 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 1620085504 is about 40250.2857629607. The cubic root of 1620085504 is about 1174.4809547552.

Adding to 1620085504 its reverse (4055800261), we get a palindrome (5675885765).

The spelling of 1620085504 in words is "one billion, six hundred twenty million, eighty-five thousand, five hundred four".