438653864 has 64 divisors (see below), whose sum is σ = 921378240. Its totient is φ = 194088960.

The previous prime is 438653863. The next prime is 438653911. The reversal of 438653864 is 468356834.

Its product of digits (1658880) is a multiple of the sum of its prime factors (810).

It is not an unprimeable number, because it can be changed into a prime (438653863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 759944 + ... + 760520.

It is an arithmetic number, because the mean of its divisors is an integer number (14396535).

Almost surely, 2^438653864 is an apocalyptic number.

438653864 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438653864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (460689120).

438653864 is an abundant number, since it is smaller than the sum of its proper divisors (482724376).

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

438653864 is a wasteful number, since it uses less digits than its factorization.

438653864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810 (or 806 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 47.

The square root of 438653864 is about 20944.0651259492. The cubic root of 438653864 is about 759.8140496131.

The spelling of 438653864 in words is "four hundred thirty-eight million, six hundred fifty-three thousand, eight hundred sixty-four".