18876840 has 32 divisors (see below), whose sum is σ = 56630880. Its totient is φ = 5033792.

The previous prime is 18876829. The next prime is 18876857. The reversal of 18876840 is 4867881.

It is a junction number, because it is equal to n+sod(n) for n = 18876792 and 18876801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78534 + ... + 78773.

It is an arithmetic number, because the mean of its divisors is an integer number (1769715).

Almost surely, 2^18876840 is an apocalyptic number.

18876840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18876840 is an abundant number, since it is smaller than the sum of its proper divisors (37754040).

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

18876840 is a wasteful number, since it uses less digits than its factorization.

18876840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157321 (or 157317 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 18876840 is about 4344.7485542894. The cubic root of 18876840 is about 266.2623525755.

It can be divided in two parts, 188 and 76840, that added together give a triangular number (77028 = T₃₉₂).

The spelling of 18876840 in words is "eighteen million, eight hundred seventy-six thousand, eight hundred forty".