18983880 has 48 divisors (see below), whose sum is σ = 61698780. Its totient is φ = 5062272.

The previous prime is 18983863. The next prime is 18983891. The reversal of 18983880 is 8838981.

It can be written as a sum of positive squares in 2 ways, for example, as 18096516 + 887364 = 4254^2 + 942^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26007 + ... + 26726.

Almost surely, 2^18983880 is an apocalyptic number.

18983880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18983880 is an abundant number, since it is smaller than the sum of its proper divisors (42714900).

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

18983880 is a wasteful number, since it uses less digits than its factorization.

18983880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52750 (or 52743 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 18983880 is about 4357.0494603573. The cubic root of 18983880 is about 266.7646792491.

It can be divided in two parts, 1898 and 3880, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 18983880 in words is "eighteen million, nine hundred eighty-three thousand, eight hundred eighty".