40818869 has 16 divisors (see below), whose sum is σ = 50389248. Its totient is φ = 32199552.

The previous prime is 40818857. The next prime is 40818907. The reversal of 40818869 is 96881804.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-40818869 is a prime.

It is a super-2 number, since 2×40818869² = 3332360132878322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40818829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55784 + ... + 56510.

It is an arithmetic number, because the mean of its divisors is an integer number (3149328).

Almost surely, 2^40818869 is an apocalyptic number.

It is an amenable number.

40818869 is a deficient number, since it is larger than the sum of its proper divisors (9570379).

40818869 is a wasteful number, since it uses less digits than its factorization.

40818869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 40818869 is about 6388.9646266042. The cubic root of 40818869 is about 344.3131865893.

The spelling of 40818869 in words is "forty million, eight hundred eighteen thousand, eight hundred sixty-nine".