18873400 has 192 divisors, whose sum is σ = 58121280. Its totient is φ = 5529600.

The previous prime is 18873331. The next prime is 18873419. The reversal of 18873400 is 437881.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 309370 + ... + 309430.

It is an arithmetic number, because the mean of its divisors is an integer number (302715).

Almost surely, 2^18873400 is an apocalyptic number.

18873400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18873400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29060640).

18873400 is an abundant number, since it is smaller than the sum of its proper divisors (39247880).

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

18873400 is a wasteful number, since it uses less digits than its factorization.

18873400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18873400 is about 4344.3526560352. The cubic root of 18873400 is about 266.2461775848.

The spelling of 18873400 in words is "eighteen million, eight hundred seventy-three thousand, four hundred".