5421449328 has 80 divisors (see below), whose sum is σ = 14840969760. Its totient is φ = 1699504128.

The previous prime is 5421449321. The next prime is 5421449333. The reversal of 5421449328 is 8239441245.

It is a happy number.

It is a super-2 number, since 2×5421449328² = 58784225632143303168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5421449328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421449321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1742238 + ... + 1745346.

It is an arithmetic number, because the mean of its divisors is an integer number (185512122).

Almost surely, 2^5421449328 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 5421449328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7420484880).

5421449328 is an abundant number, since it is smaller than the sum of its proper divisors (9419520432).

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

5421449328 is a wasteful number, since it uses less digits than its factorization.

5421449328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5274 (or 5268 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 5421449328 is about 73630.4918359235. The cubic root of 5421449328 is about 1756.7304709776.

The spelling of 5421449328 in words is "five billion, four hundred twenty-one million, four hundred forty-nine thousand, three hundred twenty-eight".