40396918389 has 32 divisors (see below), whose sum is σ = 58106139264. Its totient is φ = 24873676800.

The previous prime is 40396918379. The next prime is 40396918399. The reversal of 40396918389 is 98381969304.

It is an interprime number because it is at equal distance from previous prime (40396918379) and next prime (40396918399).

It is not a de Polignac number, because 40396918389 - 2¹⁷ = 40396787317 is a prime.

It is a super-2 number, since 2×40396918389² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40396918379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547362 + ... + 616764.

It is an arithmetic number, because the mean of its divisors is an integer number (1815816852).

Almost surely, 2^40396918389 is an apocalyptic number.

It is an amenable number.

40396918389 is a deficient number, since it is larger than the sum of its proper divisors (17709220875).

40396918389 is a wasteful number, since it uses less digits than its factorization.

40396918389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69637.

The product of its (nonzero) digits is 10077696, while the sum is 60.

The spelling of 40396918389 in words is "forty billion, three hundred ninety-six million, nine hundred eighteen thousand, three hundred eighty-nine".