4400021554 has 16 divisors (see below), whose sum is σ = 6681528000. Its totient is φ = 2173011184.

The previous prime is 4400021551. The next prime is 4400021597. The reversal of 4400021554 is 4551200044.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (4400021551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12099 + ... + 94585.

It is an arithmetic number, because the mean of its divisors is an integer number (417595500).

Almost surely, 2^4400021554 is an apocalyptic number.

4400021554 is a deficient number, since it is larger than the sum of its proper divisors (2281506446).

4400021554 is a wasteful number, since it uses less digits than its factorization.

4400021554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82817.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 4400021554 is about 66332.6582762971. The cubic root of 4400021554 is about 1638.6452169016.

Adding to 4400021554 its reverse (4551200044), we get a palindrome (8951221598).

The spelling of 4400021554 in words is "four billion, four hundred million, twenty-one thousand, five hundred fifty-four".