40630681 has 16 divisors (see below), whose sum is σ = 50533504. Its totient is φ = 31809024.

The previous prime is 40630669. The next prime is 40630691. The reversal of 40630681 is 18603604.

It is not a de Polignac number, because 40630681 - 2⁵ = 40630649 is a prime.

It is a super-3 number, since 3×40630681³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (40630621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6526 + ... + 11128.

It is an arithmetic number, because the mean of its divisors is an integer number (3158344).

Almost surely, 2^40630681 is an apocalyptic number.

It is an amenable number.

40630681 is a deficient number, since it is larger than the sum of its proper divisors (9902823).

40630681 is a wasteful number, since it uses less digits than its factorization.

40630681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4720.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40630681 is about 6374.2200307175. The cubic root of 40630681 is about 343.7832401575.

The spelling of 40630681 in words is "forty million, six hundred thirty thousand, six hundred eighty-one".