40408304520 has 128 divisors (see below), whose sum is σ = 126141027840. Its totient is φ = 10347217920.

The previous prime is 40408304491. The next prime is 40408304539. The reversal of 40408304520 is 2540380404.

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

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, 231330 + ... + 366510.

It is an arithmetic number, because the mean of its divisors is an integer number (985476780).

Almost surely, 2^40408304520 is an apocalyptic number.

40408304520 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 40408304520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63070513920).

40408304520 is an abundant number, since it is smaller than the sum of its proper divisors (85732723320).

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

40408304520 is a wasteful number, since it uses less digits than its factorization.

40408304520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135295 (or 135291 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 40408304520 its reverse (2540380404), we get a palindrome (42948684924).

The spelling of 40408304520 in words is "forty billion, four hundred eight million, three hundred four thousand, five hundred twenty".