40240865 has 16 divisors (see below), whose sum is σ = 55459200. Its totient is φ = 27457920.

The previous prime is 40240861. The next prime is 40240897. The reversal of 40240865 is 56804204.

It is not a de Polignac number, because 40240865 - 2² = 40240861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40240861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4661 + ... + 10109.

It is an arithmetic number, because the mean of its divisors is an integer number (3466200).

Almost surely, 2^40240865 is an apocalyptic number.

It is an amenable number.

40240865 is a deficient number, since it is larger than the sum of its proper divisors (15218335).

40240865 is a wasteful number, since it uses less digits than its factorization.

40240865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 40240865 is about 6343.5687905153. The cubic root of 40240865 is about 342.6802716609.

The spelling of 40240865 in words is "forty million, two hundred forty thousand, eight hundred sixty-five".