438798464 has 64 divisors (see below), whose sum is σ = 991032000. Its totient is φ = 191849472.

The previous prime is 438798463. The next prime is 438798539. The reversal of 438798464 is 464897834.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (438798461) 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, 24677 + ... + 38555.

It is an arithmetic number, because the mean of its divisors is an integer number (15484875).

Almost surely, 2^438798464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438798464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (495516000).

438798464 is an abundant number, since it is smaller than the sum of its proper divisors (552233536).

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

438798464 is a wasteful number, since it uses less digits than its factorization.

438798464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13925 (or 13913 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 53.

The square root of 438798464 is about 20947.5168934172. The cubic root of 438798464 is about 759.8975300444.

The spelling of 438798464 in words is "four hundred thirty-eight million, seven hundred ninety-eight thousand, four hundred sixty-four".