40487591 has 8 divisors (see below), whose sum is σ = 43573104. Its totient is φ = 37480320.

The previous prime is 40487569. The next prime is 40487599. The reversal of 40487591 is 19578404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40487591 - 2⁶ = 40487527 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 (40487599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18485 + ... + 20558.

It is an arithmetic number, because the mean of its divisors is an integer number (5446638).

Almost surely, 2^40487591 is an apocalyptic number.

40487591 is a deficient number, since it is larger than the sum of its proper divisors (3085513).

40487591 is a wasteful number, since it uses less digits than its factorization.

40487591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39121.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 40487591 is about 6362.9860128716. The cubic root of 40487591 is about 343.3791957042.

The spelling of 40487591 in words is "forty million, four hundred eighty-seven thousand, five hundred ninety-one".