40238487 has 6 divisors (see below), whose sum is σ = 58122272. Its totient is φ = 26825652.

The previous prime is 40238479. The next prime is 40238489. The reversal of 40238487 is 78483204.

It is not a de Polignac number, because 40238487 - 2³ = 40238479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40238489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2235463 + ... + 2235480.

Almost surely, 2^40238487 is an apocalyptic number.

40238487 is a deficient number, since it is larger than the sum of its proper divisors (17883785).

40238487 is a wasteful number, since it uses less digits than its factorization.

40238487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470949 (or 4470946 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 40238487 is about 6343.3813538207. The cubic root of 40238487 is about 342.6735213940.

The spelling of 40238487 in words is "forty million, two hundred thirty-eight thousand, four hundred eighty-seven".