1878065520 has 160 divisors (see below), whose sum is σ = 6066040320. Its totient is φ = 480076800.

The previous prime is 1878065509. The next prime is 1878065551. The reversal of 1878065520 is 255608781.

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, 1050067 + ... + 1051853.

It is an arithmetic number, because the mean of its divisors is an integer number (37912752).

Almost surely, 2^1878065520 is an apocalyptic number.

1878065520 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 1878065520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3033020160).

1878065520 is an abundant number, since it is smaller than the sum of its proper divisors (4187974800).

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

1878065520 is a wasteful number, since it uses less digits than its factorization.

1878065520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983 (or 1977 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 42.

The square root of 1878065520 is about 43336.6533087178. The cubic root of 1878065520 is about 1233.7776910316. Note that the first 3 decimals are identical.

The spelling of 1878065520 in words is "one billion, eight hundred seventy-eight million, sixty-five thousand, five hundred twenty".