1878403680 has 144 divisors (see below), whose sum is σ = 6436828944. Its totient is φ = 498816000.

The previous prime is 1878403673. The next prime is 1878403693. The reversal of 1878403680 is 863048781.

1878403680 is a `hidden beast` number, since 187 + 8 + 403 + 68 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358842 + ... + 364038.

It is an arithmetic number, because the mean of its divisors is an integer number (44700201).

Almost surely, 2^1878403680 is an apocalyptic number.

1878403680 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 1878403680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3218414472).

1878403680 is an abundant number, since it is smaller than the sum of its proper divisors (4558425264).

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

1878403680 is a wasteful number, since it uses less digits than its factorization.

1878403680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5469 (or 5458 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1878403680 is about 43340.5546803453. The cubic root of 1878403680 is about 1233.8517369441.

The spelling of 1878403680 in words is "one billion, eight hundred seventy-eight million, four hundred three thousand, six hundred eighty".