40731487 has 4 divisors (see below), whose sum is σ = 41832376. Its totient is φ = 39630600.

The previous prime is 40731479. The next prime is 40731517. The reversal of 40731487 is 78413704.

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

It is a cyclic number.

It is not a de Polignac number, because 40731487 - 2³ = 40731479 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 (40731287) 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, 550389 + ... + 550462.

It is an arithmetic number, because the mean of its divisors is an integer number (10458094).

Almost surely, 2^40731487 is an apocalyptic number.

40731487 is a deficient number, since it is larger than the sum of its proper divisors (1100889).

40731487 is a wasteful number, since it uses less digits than its factorization.

40731487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100888.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 40731487 is about 6382.1224526015. The cubic root of 40731487 is about 344.0673177027.

The spelling of 40731487 in words is "forty million, seven hundred thirty-one thousand, four hundred eighty-seven".