4350138440 has 128 divisors (see below), whose sum is σ = 10206000000. Its totient is φ = 1667905536.

The previous prime is 4350138421. The next prime is 4350138487. The reversal of 4350138440 is 448310534.

It is a junction number, because it is equal to n+sod(n) for n = 4350138397 and 4350138406.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29195486 + ... + 29195634.

It is an arithmetic number, because the mean of its divisors is an integer number (79734375).

Almost surely, 2^4350138440 is an apocalyptic number.

4350138440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4350138440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5103000000).

4350138440 is an abundant number, since it is smaller than the sum of its proper divisors (5855861560).

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

4350138440 is a wasteful number, since it uses less digits than its factorization.

4350138440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 4350138440 is about 65955.5792939460. The cubic root of 4350138440 is about 1632.4292181717.

Adding to 4350138440 its reverse (448310534), we get a palindrome (4798448974).

The spelling of 4350138440 in words is "four billion, three hundred fifty million, one hundred thirty-eight thousand, four hundred forty".