40398773 has 4 divisors (see below), whose sum is σ = 41161068. Its totient is φ = 39636480.

The previous prime is 40398751. The next prime is 40398811. The reversal of 40398773 is 37789304.

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 35724529 + 4674244 = 5977^2 + 2162^2 .

It is a cyclic number.

It is not a de Polignac number, because 40398773 - 2¹⁴ = 40382389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40398773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40398703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381068 + ... + 381173.

It is an arithmetic number, because the mean of its divisors is an integer number (10290267).

Almost surely, 2^40398773 is an apocalyptic number.

It is an amenable number.

40398773 is a deficient number, since it is larger than the sum of its proper divisors (762295).

40398773 is an equidigital number, since it uses as much as digits as its factorization.

40398773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762294.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 40398773 is about 6356.0029106350. The cubic root of 40398773 is about 343.1279205085.

The spelling of 40398773 in words is "forty million, three hundred ninety-eight thousand, seven hundred seventy-three".