440664390 has 48 divisors (see below), whose sum is σ = 1150145568. Its totient is φ = 117057408.

The previous prime is 440664379. The next prime is 440664391. The reversal of 440664390 is 93466044.

440664390 is a `hidden beast` number, since 4 + 4 + 0 + 6 + 643 + 9 + 0 = 666.

It is a super-2 number, since 2×440664390² = 388370209228144200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440664391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14362 + ... + 32978.

It is an arithmetic number, because the mean of its divisors is an integer number (23961366).

Almost surely, 2^440664390 is an apocalyptic number.

440664390 is an abundant number, since it is smaller than the sum of its proper divisors (709481178).

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

440664390 is a wasteful number, since it uses less digits than its factorization.

440664390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18893 (or 18890 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 440664390 is about 20992.0077648614. The cubic root of 440664390 is about 760.9731244138.

The spelling of 440664390 in words is "four hundred forty million, six hundred sixty-four thousand, three hundred ninety".