1984878 has 64 divisors (see below), whose sum is σ = 5184000. Its totient is φ = 551232.

The previous prime is 1984867. The next prime is 1984891. The reversal of 1984878 is 8784891.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22258 + ... + 22346.

It is an arithmetic number, because the mean of its divisors is an integer number (81000).

2^1984878 is an apocalyptic number.

1984878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1984878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2592000).

1984878 is an abundant number, since it is smaller than the sum of its proper divisors (3199122).

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

1984878 is a wasteful number, since it uses less digits than its factorization.

1984878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 160 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 1984878 is about 1408.8569835154. The cubic root of 1984878 is about 125.6737591968.

The spelling of 1984878 in words is "one million, nine hundred eighty-four thousand, eight hundred seventy-eight".