1878281140 has 12 divisors (see below), whose sum is σ = 3944390436. Its totient is φ = 751312448.

The previous prime is 1878281137. The next prime is 1878281183. The reversal of 1878281140 is 411828781.

It can be written as a sum of positive squares in 2 ways, for example, as 190550416 + 1687730724 = 13804^2 + 41082^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1878281093 and 1878281102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46957009 + ... + 46957048.

It is an arithmetic number, because the mean of its divisors is an integer number (328699203).

Almost surely, 2^1878281140 is an apocalyptic number.

1878281140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1878281140 is an abundant number, since it is smaller than the sum of its proper divisors (2066109296).

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

1878281140 is a wasteful number, since it uses less digits than its factorization.

1878281140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93914066 (or 93914064 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 40.

The square root of 1878281140 is about 43339.1409697977. The cubic root of 1878281140 is about 1233.8249057432.

The spelling of 1878281140 in words is "one billion, eight hundred seventy-eight million, two hundred eighty-one thousand, one hundred forty".