40106786 has 4 divisors (see below), whose sum is σ = 60160182. Its totient is φ = 20053392.

The previous prime is 40106767. The next prime is 40106809. The reversal of 40106786 is 68760104.

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., 32092225 + 8014561 = 5665^2 + 2831^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026695 + ... + 10026698.

Almost surely, 2^40106786 is an apocalyptic number.

40106786 is a deficient number, since it is larger than the sum of its proper divisors (20053396).

40106786 is a wasteful number, since it uses less digits than its factorization.

40106786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20053395.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 40106786 is about 6332.9918679878. The cubic root of 40106786 is about 342.2992547320.

The spelling of 40106786 in words is "forty million, one hundred six thousand, seven hundred eighty-six".