18462240 has 72 divisors (see below), whose sum is σ = 63007308. Its totient is φ = 4922880.

The previous prime is 18462229. The next prime is 18462247. The reversal of 18462240 is 4226481.

It can be written as a sum of positive squares in 2 ways, for example, as 16353936 + 2108304 = 4044^2 + 1452^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (18462247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4971 + ... + 7850.

Almost surely, 2^18462240 is an apocalyptic number.

18462240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18462240 is an abundant number, since it is smaller than the sum of its proper divisors (44545068).

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

18462240 is a wasteful number, since it uses less digits than its factorization.

18462240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12842 (or 12831 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 18462240 is about 4296.7708805567. The cubic root of 18462240 is about 264.2985602994.

The spelling of 18462240 in words is "eighteen million, four hundred sixty-two thousand, two hundred forty".