18243460 has 12 divisors (see below), whose sum is σ = 38311308. Its totient is φ = 7297376.

The previous prime is 18243457. The next prime is 18243509. The reversal of 18243460 is 6434281.

It can be written as a sum of positive squares in 2 ways, for example, as 5225796 + 13017664 = 2286^2 + 3608^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456067 + ... + 456106.

It is an arithmetic number, because the mean of its divisors is an integer number (3192609).

Almost surely, 2^18243460 is an apocalyptic number.

18243460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18243460 is an abundant number, since it is smaller than the sum of its proper divisors (20067848).

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

18243460 is a wasteful number, since it uses less digits than its factorization.

18243460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912182 (or 912180 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 18243460 is about 4271.2363549680. The cubic root of 18243460 is about 263.2504180906.

It can be divided in two parts, 18 and 243460, that multiplied together give a triangular number (4382280 = T₂₉₆₀).

The spelling of 18243460 in words is "eighteen million, two hundred forty-three thousand, four hundred sixty".