40403420320 has 96 divisors (see below), whose sum is σ = 96317859456. Its totient is φ = 16015488000.

The previous prime is 40403420293. The next prime is 40403420399. The reversal of 40403420320 is 2302430404.

It is a junction number, because it is equal to n+sod(n) for n = 40403420291 and 40403420300.

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, 11280930 + ... + 11284510.

It is an arithmetic number, because the mean of its divisors is an integer number (1003311036).

Almost surely, 2^40403420320 is an apocalyptic number.

40403420320 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 40403420320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48158929728).

40403420320 is an abundant number, since it is smaller than the sum of its proper divisors (55914439136).

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

40403420320 is a wasteful number, since it uses less digits than its factorization.

40403420320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4214 (or 4206 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 40403420320 its reverse (2302430404), we get a palindrome (42705850724).

The spelling of 40403420320 in words is "forty billion, four hundred three million, four hundred twenty thousand, three hundred twenty".