18440470 has 16 divisors (see below), whose sum is σ = 33488640. Its totient is φ = 7310464.

The previous prime is 18440453. The next prime is 18440473. The reversal of 18440470 is 7404481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18440473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7030 + ... + 9289.

It is an arithmetic number, because the mean of its divisors is an integer number (2093040).

Almost surely, 2^18440470 is an apocalyptic number.

18440470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18440470 is a deficient number, since it is larger than the sum of its proper divisors (15048170).

18440470 is a wasteful number, since it uses less digits than its factorization.

18440470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16439.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 18440470 is about 4294.2368355739. The cubic root of 18440470 is about 264.1946357000.

The spelling of 18440470 in words is "eighteen million, four hundred forty thousand, four hundred seventy".