40131786 has 8 divisors (see below), whose sum is σ = 80263584. Its totient is φ = 13377260.

The previous prime is 40131769. The next prime is 40131797. The reversal of 40131786 is 68713104.

It is a happy number.

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

40131786 is an admirable number.

It is a super-2 number, since 2×40131786² = 3221120495099592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3344310 + ... + 3344321.

It is an arithmetic number, because the mean of its divisors is an integer number (10032948).

Almost surely, 2^40131786 is an apocalyptic number.

40131786 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40131786 is a wasteful number, since it uses less digits than its factorization.

40131786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6688636.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 40131786 is about 6334.9653511286. The cubic root of 40131786 is about 342.3703624320.

The spelling of 40131786 in words is "forty million, one hundred thirty-one thousand, seven hundred eighty-six".