40798865 has 4 divisors (see below), whose sum is σ = 48958644. Its totient is φ = 32639088.

The previous prime is 40798859. The next prime is 40798931. The reversal of 40798865 is 56889704.

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 30958096 + 9840769 = 5564^2 + 3137^2 .

It is a cyclic number.

It is not a de Polignac number, because 40798865 - 2¹⁴ = 40782481 is a prime.

It is a Duffinian 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, 4079882 + ... + 4079891.

It is an arithmetic number, because the mean of its divisors is an integer number (12239661).

Almost surely, 2^40798865 is an apocalyptic number.

It is an amenable number.

40798865 is a deficient number, since it is larger than the sum of its proper divisors (8159779).

40798865 is an equidigital number, since it uses as much as digits as its factorization.

40798865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8159778.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 40798865 is about 6387.3989228793. The cubic root of 40798865 is about 344.2569318343.

The spelling of 40798865 in words is "forty million, seven hundred ninety-eight thousand, eight hundred sixty-five".