18876440 has 32 divisors (see below), whose sum is σ = 46334160. Its totient is φ = 6864000.

The previous prime is 18876439. The next prime is 18876449. The reversal of 18876440 is 4467881.

It is a junction number, because it is equal to n+sod(n) for n = 18876394 and 18876403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18876449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21011 + ... + 21890.

Almost surely, 2^18876440 is an apocalyptic number.

18876440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18876440 is an abundant number, since it is smaller than the sum of its proper divisors (27457720).

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

18876440 is a wasteful number, since it uses less digits than its factorization.

18876440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42923 (or 42919 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 18876440 is about 4344.7025214622. The cubic root of 18876440 is about 266.2604718636.

The spelling of 18876440 in words is "eighteen million, eight hundred seventy-six thousand, four hundred forty".