16440245 has 8 divisors (see below), whose sum is σ = 20408760. Its totient is φ = 12698560.

The previous prime is 16440223. The next prime is 16440251. The reversal of 16440245 is 54204461.

It can be written as a sum of positive squares in 4 ways, for example, as 5635876 + 10804369 = 2374^2 + 3287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16440245 - 2⁶ = 16440181 is a prime.

It is a super-3 number, since 3×16440245³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56546 + ... + 56835.

It is an arithmetic number, because the mean of its divisors is an integer number (2551095).

Almost surely, 2^16440245 is an apocalyptic number.

It is an amenable number.

16440245 is a deficient number, since it is larger than the sum of its proper divisors (3968515).

16440245 is a wasteful number, since it uses less digits than its factorization.

16440245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113415.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 16440245 is about 4054.6571988270. The cubic root of 16440245 is about 254.2744723479.

The spelling of 16440245 in words is "sixteen million, four hundred forty thousand, two hundred forty-five".