4400400020 has 48 divisors (see below), whose sum is σ = 10209846528. Its totient is φ = 1584591360.

The previous prime is 4400400001. The next prime is 4400400031. The reversal of 4400400020 is 200040044.

It is a junction number, because it is equal to n+sod(n) for n = 4400399968 and 4400400004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273536 + ... + 289175.

It is an arithmetic number, because the mean of its divisors is an integer number (212705136).

Almost surely, 2^4400400020 is an apocalyptic number.

It is an amenable number.

4400400020 is an abundant number, since it is smaller than the sum of its proper divisors (5809446508).

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

4400400020 is a wasteful number, since it uses less digits than its factorization.

4400400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562760 (or 562758 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 4400400020 is about 66335.5110027804. The cubic root of 4400400020 is about 1638.6921980139.

Adding to 4400400020 its reverse (200040044), we get a palindrome (4600440064).

The spelling of 4400400020 in words is "four billion, four hundred million, four hundred thousand, twenty".