40000055 has 8 divisors (see below), whose sum is σ = 49021632. Its totient is φ = 31319008.

The previous prime is 40000033. The next prime is 40000061. The reversal of 40000055 is 55000004.

40000055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40000055 - 2¹⁶ = 39934519 is a prime.

It is a Duffinian number.

40000055 is a modest number, since divided by 55 gives 40 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 39999994 and 40000039.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84872 + ... + 85341.

It is an arithmetic number, because the mean of its divisors is an integer number (6127704).

Almost surely, 2^40000055 is an apocalyptic number.

40000055 is a deficient number, since it is larger than the sum of its proper divisors (9021577).

40000055 is a wasteful number, since it uses less digits than its factorization.

40000055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170265.

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 40000055 is about 6324.5596684670. The cubic root of 40000055 is about 341.9953460831.

Adding to 40000055 its reverse (55000004), we get a palindrome (95000059).

The spelling of 40000055 in words is "forty million, fifty-five", and thus it is an aban number and an uban number.