18479340 has 240 divisors, whose sum is σ = 68058144. Its totient is φ = 4147200.

The previous prime is 18479311. The next prime is 18479353. The reversal of 18479340 is 4397481.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 18479295 and 18479304.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 302910 + ... + 302970.

Almost surely, 2^18479340 is an apocalyptic number.

18479340 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 18479340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34029072).

18479340 is an abundant number, since it is smaller than the sum of its proper divisors (49578804).

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

18479340 is a wasteful number, since it uses less digits than its factorization.

18479340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 18479340 is about 4298.7602864082. The cubic root of 18479340 is about 264.3801341994.

18479340 divided by its sum of digits (36) gives a palindrome (513315).

It can be divided in two parts, 184 and 79340, that added together give a square (79524 = 282²).

The spelling of 18479340 in words is "eighteen million, four hundred seventy-nine thousand, three hundred forty".