18440616 has 16 divisors (see below), whose sum is σ = 46101600. Its totient is φ = 6146864.

The previous prime is 18440581. The next prime is 18440623. The reversal of 18440616 is 61604481.

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, 384156 + ... + 384203.

It is an arithmetic number, because the mean of its divisors is an integer number (2881350).

Almost surely, 2^18440616 is an apocalyptic number.

It is an amenable number.

18440616 is an abundant number, since it is smaller than the sum of its proper divisors (27660984).

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

18440616 is a wasteful number, since it uses less digits than its factorization.

18440616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768368 (or 768364 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18440616 is about 4294.2538350684. The cubic root of 18440616 is about 264.1953329403.

The spelling of 18440616 in words is "eighteen million, four hundred forty thousand, six hundred sixteen".