1984864 has 24 divisors (see below), whose sum is σ = 4466448. Its totient is φ = 850560.

The previous prime is 1984859. The next prime is 1984867. The reversal of 1984864 is 4684891.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1984867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4207 + ... + 4654.

It is an arithmetic number, because the mean of its divisors is an integer number (186102).

2^1984864 is an apocalyptic number.

1984864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1984864 is an abundant number, since it is smaller than the sum of its proper divisors (2481584).

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

1984864 is an equidigital number, since it uses as much as digits as its factorization.

1984864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8878 (or 8870 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 1984864 is about 1408.8520149398. The cubic root of 1984864 is about 125.6734637233.

The spelling of 1984864 in words is "one million, nine hundred eighty-four thousand, eight hundred sixty-four".