18070440 has 32 divisors (see below), whose sum is σ = 54211680. Its totient is φ = 4818752.

The previous prime is 18070411. The next prime is 18070477. The reversal of 18070440 is 4407081.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 18070440.

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, 75174 + ... + 75413.

It is an arithmetic number, because the mean of its divisors is an integer number (1694115).

Almost surely, 2^18070440 is an apocalyptic number.

18070440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18070440 is an abundant number, since it is smaller than the sum of its proper divisors (36141240).

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

18070440 is a wasteful number, since it uses less digits than its factorization.

18070440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150601 (or 150597 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 18070440 is about 4250.9340150136. The cubic root of 18070440 is about 262.4155556042.

The spelling of 18070440 in words is "eighteen million, seventy thousand, four hundred forty".