40400004078 has 96 divisors (see below), whose sum is σ = 103802130432. Its totient is φ = 11112422400.

The previous prime is 40400003993. The next prime is 40400004079. The reversal of 40400004078 is 87040000404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400004079) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 727063 + ... + 780653.

It is an arithmetic number, because the mean of its divisors is an integer number (1081272192).

Almost surely, 2^40400004078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40400004078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51901065216).

40400004078 is an abundant number, since it is smaller than the sum of its proper divisors (63402126354).

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

40400004078 is a wasteful number, since it uses less digits than its factorization.

40400004078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53830 (or 53827 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The spelling of 40400004078 in words is "forty billion, four hundred million, four thousand, seventy-eight".