40681404 has 18 divisors (see below), whose sum is σ = 102833640. Its totient is φ = 13560456.

The previous prime is 40681349. The next prime is 40681423. The reversal of 40681404 is 40418604.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×40681404² = 3309953262822432, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564984 + ... + 565055.

It is an arithmetic number, because the mean of its divisors is an integer number (5712980).

Almost surely, 2^40681404 is an apocalyptic number.

It is an amenable number.

40681404 is an abundant number, since it is smaller than the sum of its proper divisors (62152236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40681404 is a wasteful number, since it uses less digits than its factorization.

40681404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130049 (or 1130044 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 40681404 is about 6378.1975510327. The cubic root of 40681404 is about 343.9262393683.

It can be divided in two parts, 406 and 81404, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 40681404 in words is "forty million, six hundred eighty-one thousand, four hundred four".