40864765 has 4 divisors (see below), whose sum is σ = 49037724. Its totient is φ = 32691808.

The previous prime is 40864723. The next prime is 40864777. The reversal of 40864765 is 56746804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18567481 + 22297284 = 4309^2 + 4722^2 .

It is a cyclic number.

It is not a de Polignac number, because 40864765 - 2²¹ = 38767613 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4086472 + ... + 4086481.

It is an arithmetic number, because the mean of its divisors is an integer number (12259431).

Almost surely, 2^40864765 is an apocalyptic number.

It is an amenable number.

40864765 is a deficient number, since it is larger than the sum of its proper divisors (8172959).

40864765 is an equidigital number, since it uses as much as digits as its factorization.

40864765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8172958.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 40864765 is about 6392.5554358175. Note that the first 3 decimals coincide. The cubic root of 40864765 is about 344.4421847657.

The spelling of 40864765 in words is "forty million, eight hundred sixty-four thousand, seven hundred sixty-five".