18428424 has 64 divisors (see below), whose sum is σ = 53898240. Its totient is φ = 5140800.

The previous prime is 18428419. The next prime is 18428437. The reversal of 18428424 is 42482481.

It is a super-2 number, since 2×18428424² = 679213622247552, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5949 + ... + 8499.

It is an arithmetic number, because the mean of its divisors is an integer number (842160).

Almost surely, 2^18428424 is an apocalyptic number.

18428424 is a gapful number since it is divisible by the number (14) 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 18428424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26949120).

18428424 is an abundant number, since it is smaller than the sum of its proper divisors (35469816).

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

18428424 is a wasteful number, since it uses less digits than its factorization.

18428424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610 (or 2606 counting only the distinct ones).

The product of its digits is 16384, while the sum is 33.

The square root of 18428424 is about 4292.8340289371. The cubic root of 18428424 is about 264.1370959192.

The spelling of 18428424 in words is "eighteen million, four hundred twenty-eight thousand, four hundred twenty-four".