1984904845 has 32 divisors (see below), whose sum is σ = 3019991040. Its totient is φ = 1216357440.

The previous prime is 1984904839. The next prime is 1984904879. The reversal of 1984904845 is 5484094891.

It is not a de Polignac number, because 1984904845 - 2⁵ = 1984904813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1984904792 and 1984904801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20977 + ... + 66406.

It is an arithmetic number, because the mean of its divisors is an integer number (94374720).

Almost surely, 2^1984904845 is an apocalyptic number.

It is an amenable number.

1984904845 is a deficient number, since it is larger than the sum of its proper divisors (1035086195).

1984904845 is a wasteful number, since it uses less digits than its factorization.

1984904845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87465.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The square root of 1984904845 is about 44552.2709297742. The cubic root of 1984904845 is about 1256.7432576343.

The spelling of 1984904845 in words is "one billion, nine hundred eighty-four million, nine hundred four thousand, eight hundred forty-five".