1878191064 has 160 divisors (see below), whose sum is σ = 5444651520. Its totient is φ = 604545984.

The previous prime is 1878191057. The next prime is 1878191069. The reversal of 1878191064 is 4601918781.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1878191069) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2527477 + ... + 2528219.

It is an arithmetic number, because the mean of its divisors is an integer number (34029072).

Almost surely, 2^1878191064 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 1878191064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2722325760).

1878191064 is an abundant number, since it is smaller than the sum of its proper divisors (3566460456).

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

1878191064 is a wasteful number, since it uses less digits than its factorization.

1878191064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 1878191064 is about 43338.1017581527. The cubic root of 1878191064 is about 1233.8051820737.

The spelling of 1878191064 in words is "one billion, eight hundred seventy-eight million, one hundred ninety-one thousand, sixty-four".