4478999021 has 8 divisors (see below), whose sum is σ = 5119920000. Its totient is φ = 3838344048.

The previous prime is 4478998973. The next prime is 4478999033. The reversal of 4478999021 is 1209998744.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4478999021 - 2¹⁴ = 4478982637 is a prime.

It is a super-2 number, since 2×4478999021² = 40122864460237916882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4478999521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29006 + ... + 98991.

It is an arithmetic number, because the mean of its divisors is an integer number (639990000).

Almost surely, 2^4478999021 is an apocalyptic number.

It is an amenable number.

4478999021 is a deficient number, since it is larger than the sum of its proper divisors (640920979).

4478999021 is a wasteful number, since it uses less digits than its factorization.

4478999021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133003.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 4478999021 is about 66925.3242128867. The cubic root of 4478999021 is about 1648.3913333960.

The spelling of 4478999021 in words is "four billion, four hundred seventy-eight million, nine hundred ninety-nine thousand, twenty-one".