40158686 has 4 divisors (see below), whose sum is σ = 60238032. Its totient is φ = 20079342.

The previous prime is 40158659. The next prime is 40158691. The reversal of 40158686 is 68685104.

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

It is a super-2 number, since 2×40158686² = 3225440122493192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10039670 + ... + 10039673.

It is an arithmetic number, because the mean of its divisors is an integer number (15059508).

Almost surely, 2^40158686 is an apocalyptic number.

40158686 is a deficient number, since it is larger than the sum of its proper divisors (20079346).

40158686 is a wasteful number, since it uses less digits than its factorization.

40158686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20079345.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 40158686 is about 6337.0881325732. The cubic root of 40158686 is about 342.4468413422.

The spelling of 40158686 in words is "forty million, one hundred fifty-eight thousand, six hundred eighty-six".