40958781 has 12 divisors (see below), whose sum is σ = 56434176. Its totient is φ = 26423160.

The previous prime is 40958717. The next prime is 40958783. The reversal of 40958781 is 18785904.

It is not a de Polignac number, because 40958781 - 2⁶ = 40958717 is a prime.

It is a super-2 number, since 2×40958781² = 3355243482011922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40958783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4221 + ... + 9986.

It is an arithmetic number, because the mean of its divisors is an integer number (4702848).

Almost surely, 2^40958781 is an apocalyptic number.

It is an amenable number.

40958781 is a deficient number, since it is larger than the sum of its proper divisors (15475395).

40958781 is a wasteful number, since it uses less digits than its factorization.

40958781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14272 (or 14241 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 40958781 is about 6399.9047649164. The cubic root of 40958781 is about 344.7061307672.

The spelling of 40958781 in words is "forty million, nine hundred fifty-eight thousand, seven hundred eighty-one".