4400400144540 has 24 divisors (see below), whose sum is σ = 12321120404880. Its totient is φ = 1173440038528.

The previous prime is 4400400144451. The next prime is 4400400144599. The reversal of 4400400144540 is 454410040044.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 4400400144498 and 4400400144507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36670001145 + ... + 36670001264.

It is an arithmetic number, because the mean of its divisors is an integer number (513380016870).

Almost surely, 2^{4400400144540} is an apocalyptic number.

It is an amenable number.

4400400144540 is an abundant number, since it is smaller than the sum of its proper divisors (7920720260340).

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

4400400144540 is a wasteful number, since it uses less digits than its factorization.

4400400144540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73340002421 (or 73340002419 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 30.

Adding to 4400400144540 its reverse (454410040044), we get a palindrome (4854810184584).

The spelling of 4400400144540 in words is "four trillion, four hundred billion, four hundred million, one hundred forty-four thousand, five hundred forty".