40147238 has 4 divisors (see below), whose sum is σ = 60220860. Its totient is φ = 20073618.

The previous prime is 40147187. The next prime is 40147243. The reversal of 40147238 is 83274104.

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

It is a super-2 number, since 2×40147238² = 3223601438057288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40147238.

It is a congruent number.

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, 10036808 + ... + 10036811.

It is an arithmetic number, because the mean of its divisors is an integer number (15055215).

Almost surely, 2^40147238 is an apocalyptic number.

40147238 is a deficient number, since it is larger than the sum of its proper divisors (20073622).

40147238 is a wasteful number, since it uses less digits than its factorization.

40147238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20073621.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 40147238 is about 6336.1848142238. The cubic root of 40147238 is about 342.4142979134.

The spelling of 40147238 in words is "forty million, one hundred forty-seven thousand, two hundred thirty-eight".