4428021481 has 16 divisors (see below), whose sum is σ = 4877236224. Its totient is φ = 3994576704.

The previous prime is 4428021473. The next prime is 4428021487. The reversal of 4428021481 is 1841208244.

It is a cyclic number.

It is not a de Polignac number, because 4428021481 - 2³ = 4428021473 is a prime.

It is a super-2 number, since 2×4428021481² = 39214748472394866722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4428021487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442920 + ... + 452806.

It is an arithmetic number, because the mean of its divisors is an integer number (304827264).

Almost surely, 2^4428021481 is an apocalyptic number.

It is an amenable number.

4428021481 is a deficient number, since it is larger than the sum of its proper divisors (449214743).

4428021481 is a wasteful number, since it uses less digits than its factorization.

4428021481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10680.

The product of its (nonzero) digits is 16384, while the sum is 34.

The square root of 4428021481 is about 66543.3804446393. The cubic root of 4428021481 is about 1642.1137578243.

The spelling of 4428021481 in words is "four billion, four hundred twenty-eight million, twenty-one thousand, four hundred eighty-one".