40686842 has 32 divisors (see below), whose sum is σ = 72503424. Its totient is φ = 16761600.

The previous prime is 40686827. The next prime is 40686853. The reversal of 40686842 is 24868604.

It is a happy number.

It is a super-2 number, since 2×40686842² = 3310838223865928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40686796 and 40686805.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41417 + ... + 42387.

It is an arithmetic number, because the mean of its divisors is an integer number (2265732).

Almost surely, 2^40686842 is an apocalyptic number.

40686842 is a deficient number, since it is larger than the sum of its proper divisors (31816582).

40686842 is a wasteful number, since it uses less digits than its factorization.

40686842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094.

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 40686842 is about 6378.6238327715. The cubic root of 40686842 is about 343.9415632213.

The spelling of 40686842 in words is "forty million, six hundred eighty-six thousand, eight hundred forty-two".