40086289 has 4 divisors (see below), whose sum is σ = 42444324. Its totient is φ = 37728256.

The previous prime is 40086269. The next prime is 40086313. The reversal of 40086289 is 98268004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27248400 + 12837889 = 5220^2 + 3583^2 .

It is a cyclic number.

It is not a de Polignac number, because 40086289 - 2⁷ = 40086161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40086229) 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, 1178992 + ... + 1179025.

It is an arithmetic number, because the mean of its divisors is an integer number (10611081).

Almost surely, 2^40086289 is an apocalyptic number.

It is an amenable number.

40086289 is a deficient number, since it is larger than the sum of its proper divisors (2358035).

40086289 is a wasteful number, since it uses less digits than its factorization.

40086289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358034.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 40086289 is about 6331.3733897157. The cubic root of 40086289 is about 342.2409329027.

The spelling of 40086289 in words is "forty million, eighty-six thousand, two hundred eighty-nine".