40408404408 has 24 divisors (see below), whose sum is σ = 109439428800. Its totient is φ = 13469468112.

The previous prime is 40408404401. The next prime is 40408404437. The reversal of 40408404408 is 80440480404.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40408404401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280613848 + ... + 280613991.

It is an arithmetic number, because the mean of its divisors is an integer number (4559976200).

Almost surely, 2^40408404408 is an apocalyptic number.

It is an amenable number.

40408404408 is an abundant number, since it is smaller than the sum of its proper divisors (69031024392).

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

40408404408 is a wasteful number, since it uses less digits than its factorization.

40408404408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561227851 (or 561227844 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 36.

The spelling of 40408404408 in words is "forty billion, four hundred eight million, four hundred four thousand, four hundred eight".