1878812881 has 8 divisors (see below), whose sum is σ = 2049928128. Its totient is φ = 1707750000.

The previous prime is 1878812869. The next prime is 1878812911. The reversal of 1878812881 is 1882188781.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1878812881 - 2⁵ = 1878812849 is a prime.

It is a super-2 number, since 2×1878812881² = 7059875683623040322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1878812281) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 129756 + ... + 143506.

It is an arithmetic number, because the mean of its divisors is an integer number (256241016).

Almost surely, 2^1878812881 is an apocalyptic number.

1878812881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1878812881 is a deficient number, since it is larger than the sum of its proper divisors (171115247).

1878812881 is a wasteful number, since it uses less digits than its factorization.

1878812881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26183.

The product of its digits is 458752, while the sum is 52.

The square root of 1878812881 is about 43345.2751865760. The cubic root of 1878812881 is about 1233.9413266157.

The spelling of 1878812881 in words is "one billion, eight hundred seventy-eight million, eight hundred twelve thousand, eight hundred eighty-one".