40681930 has 16 divisors (see below), whose sum is σ = 73300320. Its totient is φ = 16256592.

The previous prime is 40681909. The next prime is 40681939. The reversal of 40681930 is 3918604.

It is a junction number, because it is equal to n+sod(n) for n = 40681892 and 40681901.

It is not an unprimeable number, because it can be changed into a prime (40681939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17581 + ... + 19759.

It is an arithmetic number, because the mean of its divisors is an integer number (4581270).

Almost surely, 2^40681930 is an apocalyptic number.

40681930 is a deficient number, since it is larger than the sum of its proper divisors (32618390).

40681930 is a wasteful number, since it uses less digits than its factorization.

40681930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 40681930 is about 6378.2387851193. The cubic root of 40681930 is about 343.9277216543.

The spelling of 40681930 in words is "forty million, six hundred eighty-one thousand, nine hundred thirty".