4391321280 has 224 divisors, whose sum is σ = 14198583744. Its totient is φ = 1149763584.

The previous prime is 4391321273. The next prime is 4391321309. The reversal of 4391321280 is 821231934.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22752864 + ... + 22753056.

Almost surely, 2^4391321280 is an apocalyptic number.

4391321280 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 4391321280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7099291872).

4391321280 is an abundant number, since it is smaller than the sum of its proper divisors (9807262464).

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

4391321280 is a wasteful number, since it uses less digits than its factorization.

4391321280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 4391321280 is about 66267.0452034795. The cubic root of 4391321280 is about 1637.5644593626.

The spelling of 4391321280 in words is "four billion, three hundred ninety-one million, three hundred twenty-one thousand, two hundred eighty".