18428958 has 20 divisors (see below), whose sum is σ = 41294880. Its totient is φ = 6142932.

The previous prime is 18428947. The next prime is 18428959. The reversal of 18428958 is 85982481.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18428959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 56718 + ... + 57041.

It is an arithmetic number, because the mean of its divisors is an integer number (2064744).

Almost surely, 2^18428958 is an apocalyptic number.

18428958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18428958 is an abundant number, since it is smaller than the sum of its proper divisors (22865922).

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

18428958 is a wasteful number, since it uses less digits than its factorization.

18428958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113773 (or 113764 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 18428958 is about 4292.8962251608. The cubic root of 18428958 is about 264.1396471926.

The spelling of 18428958 in words is "eighteen million, four hundred twenty-eight thousand, nine hundred fifty-eight".