18797400 has 144 divisors (see below), whose sum is σ = 65862600. Its totient is φ = 4927680.

The previous prime is 18797381. The next prime is 18797411. The reversal of 18797400 is 479781.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 318571 + ... + 318629.

Almost surely, 2^18797400 is an apocalyptic number.

18797400 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 18797400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32931300).

18797400 is an abundant number, since it is smaller than the sum of its proper divisors (47065200).

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

18797400 is a wasteful number, since it uses less digits than its factorization.

18797400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 18797400 is about 4335.5968447262. The cubic root of 18797400 is about 265.8883206537. Note that the first 3 decimals are identical.

The spelling of 18797400 in words is "eighteen million, seven hundred ninety-seven thousand, four hundred".