40681773 has 18 divisors (see below), whose sum is σ = 64591982. Its totient is φ = 24654960.

The previous prime is 40681763. The next prime is 40681777. The reversal of 40681773 is 37718604.

It can be written as a sum of positive squares in only one way, i.e., 30008484 + 10673289 = 5478^2 + 3267^2 .

It is not a de Polignac number, because 40681773 - 2⁴ = 40681757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40681777) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17590 + ... + 19767.

Almost surely, 2^40681773 is an apocalyptic number.

It is an amenable number.

40681773 is a deficient number, since it is larger than the sum of its proper divisors (23910209).

40681773 is a wasteful number, since it uses less digits than its factorization.

40681773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37385 (or 37371 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 40681773 is about 6378.2264776347. The cubic root of 40681773 is about 343.9272792243.

The spelling of 40681773 in words is "forty million, six hundred eighty-one thousand, seven hundred seventy-three".