40401430440 has 128 divisors (see below), whose sum is σ = 139320380160. Its totient is φ = 9181200384.

The previous prime is 40401430361. The next prime is 40401430457. The reversal of 40401430440 is 4403410404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40401430440.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6312 + ... + 284328.

It is an arithmetic number, because the mean of its divisors is an integer number (1088440470).

Almost surely, 2^40401430440 is an apocalyptic number.

40401430440 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 40401430440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69660190080).

40401430440 is an abundant number, since it is smaller than the sum of its proper divisors (98918949720).

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

40401430440 is a wasteful number, since it uses less digits than its factorization.

40401430440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278211 (or 278207 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 40401430440 its reverse (4403410404), we get a palindrome (44804840844).

The spelling of 40401430440 in words is "forty billion, four hundred one million, four hundred thirty thousand, four hundred forty".