18228570 has 16 divisors (see below), whose sum is σ = 43748640. Its totient is φ = 4860944.

The previous prime is 18228563. The next prime is 18228577. The reversal of 18228570 is 7582281.

It is an interprime number because it is at equal distance from previous prime (18228563) and next prime (18228577).

It is not an unprimeable number, because it can be changed into a prime (18228577) 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 7 ways as a sum of consecutive naturals, for example, 303780 + ... + 303839.

It is an arithmetic number, because the mean of its divisors is an integer number (2734290).

Almost surely, 2^18228570 is an apocalyptic number.

18228570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18228570 is an abundant number, since it is smaller than the sum of its proper divisors (25520070).

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

18228570 is a wasteful number, since it uses less digits than its factorization.

18228570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607629.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 18228570 is about 4269.4929441328. The cubic root of 18228570 is about 263.1787784339.

The spelling of 18228570 in words is "eighteen million, two hundred twenty-eight thousand, five hundred seventy".