4399361280 has 432 divisors, whose sum is σ = 15999320064. Its totient is φ = 1114767360.

The previous prime is 4399361273. The next prime is 4399361339. The reversal of 4399361280 is 821639934.

It is a happy number.

4399361280 is a `hidden beast` number, since 4 + 3 + 9 + 9 + 361 + 280 = 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 47 ways as a sum of consecutive naturals, for example, 34640577 + ... + 34640703.

Almost surely, 2^4399361280 is an apocalyptic number.

4399361280 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 4399361280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7999660032).

4399361280 is an abundant number, since it is smaller than the sum of its proper divisors (11599958784).

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

4399361280 is a wasteful number, since it uses less digits than its factorization.

4399361280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 4399361280 is about 66327.6810992213. The cubic root of 4399361280 is about 1638.5632469276.

The spelling of 4399361280 in words is "four billion, three hundred ninety-nine million, three hundred sixty-one thousand, two hundred eighty".