40055389 has 4 divisors (see below), whose sum is σ = 43696800. Its totient is φ = 36413980.

The previous prime is 40055369. The next prime is 40055437. The reversal of 40055389 is 98355004.

40055389 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40055389 - 2⁷ = 40055261 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 (40055339) 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, 1820689 + ... + 1820710.

It is an arithmetic number, because the mean of its divisors is an integer number (10924200).

Almost surely, 2^40055389 is an apocalyptic number.

It is an amenable number.

40055389 is a deficient number, since it is larger than the sum of its proper divisors (3641411).

40055389 is a wasteful number, since it uses less digits than its factorization.

40055389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641410.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 40055389 is about 6328.9326904305. The cubic root of 40055389 is about 342.1529729583.

The spelling of 40055389 in words is "forty million, fifty-five thousand, three hundred eighty-nine".