40405455 has 12 divisors (see below), whose sum is σ = 70036200. Its totient is φ = 21549552.

The previous prime is 40405433. The next prime is 40405471. The reversal of 40405455 is 55450404.

40405455 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 40405455 - 2¹³ = 40397263 is a prime.

It is a plaindrome in base 16.

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 11 ways as a sum of consecutive naturals, for example, 448905 + ... + 448994.

It is an arithmetic number, because the mean of its divisors is an integer number (5836350).

Almost surely, 2^40405455 is an apocalyptic number.

40405455 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40405455 is a deficient number, since it is larger than the sum of its proper divisors (29630745).

40405455 is a wasteful number, since it uses less digits than its factorization.

40405455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897910 (or 897907 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 40405455 is about 6356.5285337203. The cubic root of 40405455 is about 343.1468373732.

Adding to 40405455 its reverse (55450404), we get a palindrome (95855859).

The spelling of 40405455 in words is "forty million, four hundred five thousand, four hundred fifty-five".