438965505 has 24 divisors (see below), whose sum is σ = 830044800. Its totient is φ = 212831520.

The previous prime is 438965497. The next prime is 438965519. The reversal of 438965505 is 505569834.

438965505 is a `hidden beast` number, since 4 + 3 + 8 + 96 + 550 + 5 = 666.

It is not a de Polignac number, because 438965505 - 2³ = 438965497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 442905 + ... + 443894.

It is an arithmetic number, because the mean of its divisors is an integer number (34585200).

Almost surely, 2^438965505 is an apocalyptic number.

438965505 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

438965505 is a deficient number, since it is larger than the sum of its proper divisors (391079295).

438965505 is a wasteful number, since it uses less digits than its factorization.

438965505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886821 (or 886818 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The square root of 438965505 is about 20951.5036453234. The cubic root of 438965505 is about 759.9939432804.

The spelling of 438965505 in words is "four hundred thirty-eight million, nine hundred sixty-five thousand, five hundred five".