40402055 has 4 divisors (see below), whose sum is σ = 48482472. Its totient is φ = 32321640.

The previous prime is 40402051. The next prime is 40402057. The reversal of 40402055 is 55020404.

It is a happy number.

40402055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40402055 - 2² = 40402051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402051) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4040201 + ... + 4040210.

It is an arithmetic number, because the mean of its divisors is an integer number (12120618).

Almost surely, 2^40402055 is an apocalyptic number.

40402055 is a deficient number, since it is larger than the sum of its proper divisors (8080417).

40402055 is an equidigital number, since it uses as much as digits as its factorization.

40402055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8080416.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40402055 is about 6356.2610865193. The cubic root of 40402055 is about 343.1372121714.

Adding to 40402055 its reverse (55020404), we get a palindrome (95422459).

The spelling of 40402055 in words is "forty million, four hundred two thousand, fifty-five".