40555869 has 4 divisors (see below), whose sum is σ = 54074496. Its totient is φ = 27037244.

The previous prime is 40555849. The next prime is 40555873. The reversal of 40555869 is 96855504.

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 40555869 - 2⁷ = 40555741 is a prime.

It is a super-2 number, since 2×40555869² = 3289557020690322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40555869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40555849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6759309 + ... + 6759314.

It is an arithmetic number, because the mean of its divisors is an integer number (13518624).

Almost surely, 2^40555869 is an apocalyptic number.

It is an amenable number.

40555869 is a deficient number, since it is larger than the sum of its proper divisors (13518627).

40555869 is a wasteful number, since it uses less digits than its factorization.

40555869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13518626.

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 40555869 is about 6368.3490011148. The cubic root of 40555869 is about 343.5721114197.

The spelling of 40555869 in words is "forty million, five hundred fifty-five thousand, eight hundred sixty-nine".