1984086920 has 32 divisors (see below), whose sum is σ = 4490942400. Its totient is φ = 788879808.

The previous prime is 1984086919. The next prime is 1984086943. The reversal of 1984086920 is 296804891.

It is a super-2 number, since 2×1984086920² = 7873201812230172800, which contains 22 as substring.

It is an unprimeable number.

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, 141830 + ... + 155189.

It is an arithmetic number, because the mean of its divisors is an integer number (140341950).

Almost surely, 2^1984086920 is an apocalyptic number.

1984086920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1984086920 is an abundant number, since it is smaller than the sum of its proper divisors (2506855480).

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

1984086920 is a wasteful number, since it uses less digits than its factorization.

1984086920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297197 (or 297193 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 1984086920 is about 44543.0905977571. The cubic root of 1984086920 is about 1256.5706107428.

The spelling of 1984086920 in words is "one billion, nine hundred eighty-four million, eighty-six thousand, nine hundred twenty".