40130786 has 4 divisors (see below), whose sum is σ = 60196182. Its totient is φ = 20065392.

The previous prime is 40130747. The next prime is 40130803. The reversal of 40130786 is 68703104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39375625 + 755161 = 6275^2 + 869^2 .

It is a super-2 number, since 2×40130786² = 3220959969955592, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10032695 + ... + 10032698.

Almost surely, 2^40130786 is an apocalyptic number.

40130786 is a deficient number, since it is larger than the sum of its proper divisors (20065396).

40130786 is a wasteful number, since it uses less digits than its factorization.

40130786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20065395.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40130786 is about 6334.8864236070. The cubic root of 40130786 is about 342.3675186911.

The spelling of 40130786 in words is "forty million, one hundred thirty thousand, seven hundred eighty-six".