40638055 has 16 divisors (see below), whose sum is σ = 52992000. Its totient is φ = 29803680.

The previous prime is 40638049. The next prime is 40638067. The reversal of 40638055 is 55083604.

40638055 = 2600² + 2601² + ... + 2605².

40638055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40638055 - 2³ = 40638047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

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 15 ways as a sum of consecutive naturals, for example, 3955 + ... + 9844.

It is an arithmetic number, because the mean of its divisors is an integer number (3312000).

Almost surely, 2^40638055 is an apocalyptic number.

40638055 is a deficient number, since it is larger than the sum of its proper divisors (12353945).

40638055 is a wasteful number, since it uses less digits than its factorization.

40638055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13854.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 40638055 is about 6374.7984281858. The cubic root of 40638055 is about 343.8040364639.

The spelling of 40638055 in words is "forty million, six hundred thirty-eight thousand, fifty-five".