1620089004 has 24 divisors (see below), whose sum is σ = 3783298288. Its totient is φ = 539588160.

The previous prime is 1620088999. The next prime is 1620089071. The reversal of 1620089004 is 4009800261.

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 7 ways as a sum of consecutive naturals, for example, 39727 + ... + 69414.

Almost surely, 2^1620089004 is an apocalyptic number.

It is an amenable number.

1620089004 is an abundant number, since it is smaller than the sum of its proper divisors (2163209284).

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

1620089004 is a wasteful number, since it uses less digits than its factorization.

1620089004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110385 (or 110383 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1620089004 is about 40250.3292408894. The cubic root of 1620089004 is about 1174.4818005296.

Adding to 1620089004 its reverse (4009800261), we get a palindrome (5629889265).

The spelling of 1620089004 in words is "one billion, six hundred twenty million, eighty-nine thousand, four".