1878009864 has 64 divisors (see below), whose sum is σ = 4814135040. Its totient is φ = 610182720.

The previous prime is 1878009841. The next prime is 1878009877. The reversal of 1878009864 is 4689008781.

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 15 ways as a sum of consecutive naturals, for example, 587679 + ... + 590865.

It is an arithmetic number, because the mean of its divisors is an integer number (75220860).

Almost surely, 2^1878009864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1878009864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407067520).

1878009864 is an abundant number, since it is smaller than the sum of its proper divisors (2936125176).

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

1878009864 is a wasteful number, since it uses less digits than its factorization.

1878009864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810 (or 3806 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 51.

The square root of 1878009864 is about 43336.0111685420. The cubic root of 1878009864 is about 1233.7655033472.

The spelling of 1878009864 in words is "one billion, eight hundred seventy-eight million, nine thousand, eight hundred sixty-four".