40561587 has 32 divisors (see below), whose sum is σ = 67173120. Its totient is φ = 23976000.

The previous prime is 40561571. The next prime is 40561601. The reversal of 40561587 is 78516504.

40561587 is a `hidden beast` number, since 40 + 561 + 58 + 7 = 666.

It is not a de Polignac number, because 40561587 - 2⁴ = 40561571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40561537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10512 + ... + 13842.

It is an arithmetic number, because the mean of its divisors is an integer number (2099160).

Almost surely, 2^40561587 is an apocalyptic number.

40561587 is a deficient number, since it is larger than the sum of its proper divisors (26611533).

40561587 is a wasteful number, since it uses less digits than its factorization.

40561587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392 (or 3386 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 40561587 is about 6368.7979242554. The cubic root of 40561587 is about 343.5882574840.

The spelling of 40561587 in words is "forty million, five hundred sixty-one thousand, five hundred eighty-seven".