40686142 has 8 divisors (see below), whose sum is σ = 69747696. Its totient is φ = 17436912.

The previous prime is 40686131. The next prime is 40686143. The reversal of 40686142 is 24168604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40686143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453063 + ... + 1453090.

It is an arithmetic number, because the mean of its divisors is an integer number (8718462).

Almost surely, 2^40686142 is an apocalyptic number.

40686142 is a deficient number, since it is larger than the sum of its proper divisors (29061554).

40686142 is a wasteful number, since it uses less digits than its factorization.

40686142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906162.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 40686142 is about 6378.5689617656. The cubic root of 40686142 is about 343.9395907534.

The spelling of 40686142 in words is "forty million, six hundred eighty-six thousand, one hundred forty-two".