18428830 has 16 divisors (see below), whose sum is σ = 37910880. Its totient is φ = 6318432.

The previous prime is 18428807. The next prime is 18428857. The reversal of 18428830 is 3882481.

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 7 ways as a sum of consecutive naturals, for example, 131565 + ... + 131704.

It is an arithmetic number, because the mean of its divisors is an integer number (2369430).

Almost surely, 2^18428830 is an apocalyptic number.

18428830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18428830 is an abundant number, since it is smaller than the sum of its proper divisors (19482050).

18428830 is a wasteful number, since it uses less digits than its factorization.

18428830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263283.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 18428830 is about 4292.8813167848. The cubic root of 18428830 is about 264.1390356559.

The spelling of 18428830 in words is "eighteen million, four hundred twenty-eight thousand, eight hundred thirty".