40138606 has 4 divisors (see below), whose sum is σ = 60207912. Its totient is φ = 20069302.

The previous prime is 40138603. The next prime is 40138607. The reversal of 40138606 is 60683104.

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

It is a super-2 number, since 2×40138606² = 3222215383246472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40138601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10034650 + ... + 10034653.

It is an arithmetic number, because the mean of its divisors is an integer number (15051978).

Almost surely, 2^40138606 is an apocalyptic number.

40138606 is a deficient number, since it is larger than the sum of its proper divisors (20069306).

40138606 is a wasteful number, since it uses less digits than its factorization.

40138606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20069305.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40138606 is about 6335.5036106059. The cubic root of 40138606 is about 342.3897554855.

The spelling of 40138606 in words is "forty million, one hundred thirty-eight thousand, six hundred six".