4388638320 has 280 divisors, whose sum is σ = 16691578992. Its totient is φ = 1063756800.

The previous prime is 4388638313. The next prime is 4388638337. The reversal of 4388638320 is 238368834.

4388638320 is a `hidden beast` number, since 4 + 3 + 8 + 8 + 638 + 3 + 2 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 638100 + ... + 644940.

Almost surely, 2^4388638320 is an apocalyptic number.

4388638320 is a gapful number since it is divisible by the number (40) 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 4388638320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8345789496).

4388638320 is an abundant number, since it is smaller than the sum of its proper divisors (12302940672).

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

4388638320 is a wasteful number, since it uses less digits than its factorization.

4388638320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6883 (or 6862 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 4388638320 is about 66246.7985641570. The cubic root of 4388638320 is about 1637.2308911923.

The spelling of 4388638320 in words is "four billion, three hundred eighty-eight million, six hundred thirty-eight thousand, three hundred twenty".