40400587 has 2 divisors, whose sum is σ = 40400588. Its totient is φ = 40400586.

The previous prime is 40400579. The next prime is 40400599. The reversal of 40400587 is 78500404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40400587 - 2³ = 40400579 is a prime.

It is not a weakly prime, because it can be changed into another prime (40400527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200293 + 20200294.

It is an arithmetic number, because the mean of its divisors is an integer number (20200294).

Almost surely, 2^40400587 is an apocalyptic number.

40400587 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400587 is an equidigital number, since it uses as much as digits as its factorization.

40400587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 40400587 is about 6356.1456087790. The cubic root of 40400587 is about 343.1330561820.

The spelling of 40400587 in words is "forty million, four hundred thousand, five hundred eighty-seven".