40391087 has 8 divisors (see below), whose sum is σ = 45254352. Its totient is φ = 35726400.

The previous prime is 40391083. The next prime is 40391101. The reversal of 40391087 is 78019304.

40391087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40391087 - 2² = 40391083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40391081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49214 + ... + 50027.

It is an arithmetic number, because the mean of its divisors is an integer number (5656794).

Almost surely, 2^40391087 is an apocalyptic number.

40391087 is a deficient number, since it is larger than the sum of its proper divisors (4863265).

40391087 is a wasteful number, since it uses less digits than its factorization.

40391087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99289.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 40391087 is about 6355.3982566004. The cubic root of 40391087 is about 343.1061587216.

The spelling of 40391087 in words is "forty million, three hundred ninety-one thousand, eighty-seven".