1620004989 has 16 divisors (see below), whose sum is σ = 2238940800. Its totient is φ = 1040684736.

The previous prime is 1620004957. The next prime is 1620005011. The reversal of 1620004989 is 9894000261.

It is not a de Polignac number, because 1620004989 - 2⁵ = 1620004957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620104989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25992 + ... + 62574.

It is an arithmetic number, because the mean of its divisors is an integer number (139933800).

Almost surely, 2^1620004989 is an apocalyptic number.

It is an amenable number.

1620004989 is a deficient number, since it is larger than the sum of its proper divisors (618935811).

1620004989 is a wasteful number, since it uses less digits than its factorization.

1620004989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37124.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1620004989 is about 40249.2855712993. The cubic root of 1620004989 is about 1174.4614979837.

The spelling of 1620004989 in words is "one billion, six hundred twenty million, four thousand, nine hundred eighty-nine".