40218969 has 16 divisors (see below), whose sum is σ = 63400320. Its totient is φ = 22189440.

The previous prime is 40218967. The next prime is 40218989. The reversal of 40218969 is 96981204.

40218969 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 40218969 - 2¹ = 40218967 is a prime.

It is a super-2 number, since 2×40218969² = 3235130934845922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40218967) 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 15 ways as a sum of consecutive naturals, for example, 32412 + ... + 33629.

It is an arithmetic number, because the mean of its divisors is an integer number (3962520).

Almost surely, 2^40218969 is an apocalyptic number.

It is an amenable number.

40218969 is a deficient number, since it is larger than the sum of its proper divisors (23181351).

40218969 is a wasteful number, since it uses less digits than its factorization.

40218969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66080.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 40218969 is about 6341.8427132814. The cubic root of 40218969 is about 342.6181069224.

The spelling of 40218969 in words is "forty million, two hundred eighteen thousand, nine hundred sixty-nine".