1878003840 has 128 divisors (see below), whose sum is σ = 6068592000. Its totient is φ = 493903872.

The previous prime is 1878003823. The next prime is 1878003847. The reversal of 1878003840 is 483008781.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (1878003847) 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, 133461 + ... + 146859.

It is an arithmetic number, because the mean of its divisors is an integer number (47410875).

Almost surely, 2^1878003840 is an apocalyptic number.

1878003840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1878003840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3034296000).

1878003840 is an abundant number, since it is smaller than the sum of its proper divisors (4190588160).

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

1878003840 is a wasteful number, since it uses less digits than its factorization.

1878003840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13494 (or 13482 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 1878003840 is about 43335.9416650890. The cubic root of 1878003840 is about 1233.7641841828.

The spelling of 1878003840 in words is "one billion, eight hundred seventy-eight million, three thousand, eight hundred forty".