4399232640 has 384 divisors, whose sum is σ = 16172809920. Its totient is φ = 1008599040.

The previous prime is 4399232611. The next prime is 4399232657. The reversal of 4399232640 is 462329934.

It is a tau number, because it is divible by the number of its divisors (384).

It is a junction number, because it is equal to n+sod(n) for n = 4399232592 and 4399232601.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7624032 + ... + 7624608.

Almost surely, 2^4399232640 is an apocalyptic number.

4399232640 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 4399232640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8086404960).

4399232640 is an abundant number, since it is smaller than the sum of its proper divisors (11773577280).

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

4399232640 is a wasteful number, since it uses less digits than its factorization.

4399232640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 4399232640 is about 66326.7113612608. The cubic root of 4399232640 is about 1638.5472759099.

The spelling of 4399232640 in words is "four billion, three hundred ninety-nine million, two hundred thirty-two thousand, six hundred forty".