18428630 has 64 divisors (see below), whose sum is σ = 38491200. Its totient is φ = 6289920.

The previous prime is 18428623. The next prime is 18428633. The reversal of 18428630 is 3682481.

It is a super-2 number, since 2×18428630² = 679228807353800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18428633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169016 + ... + 169124.

It is an arithmetic number, because the mean of its divisors is an integer number (601425).

Almost surely, 2^18428630 is an apocalyptic number.

18428630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18428630 is an abundant number, since it is smaller than the sum of its proper divisors (20062570).

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

18428630 is a wasteful number, since it uses less digits than its factorization.

18428630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18428630 is about 4292.8580223436. The cubic root of 18428630 is about 264.1380801242.

The spelling of 18428630 in words is "eighteen million, four hundred twenty-eight thousand, six hundred thirty".