18413428 has 48 divisors (see below), whose sum is σ = 36832320. Its totient is φ = 7980800.

The previous prime is 18413407. The next prime is 18413443. The reversal of 18413428 is 82431481.

It is a super-2 number, since 2×18413428² = 678108661422368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18413428.

It is a congruent number.

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, 106350 + ... + 106522.

It is an arithmetic number, because the mean of its divisors is an integer number (767340).

Almost surely, 2^18413428 is an apocalyptic number.

It is an amenable number.

18413428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

18413428 is a wasteful number, since it uses less digits than its factorization.

18413428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 286 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 18413428 is about 4291.0870417646. The cubic root of 18413428 is about 264.0654299104.

The spelling of 18413428 in words is "eighteen million, four hundred thirteen thousand, four hundred twenty-eight".