40138211 has 8 divisors (see below), whose sum is σ = 41618304. Its totient is φ = 38669760.

The previous prime is 40138201. The next prime is 40138237. The reversal of 40138211 is 11283104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40138211 - 2¹⁴ = 40121827 is a prime.

It is a super-2 number, since 2×40138211² = 3222151964561042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40138201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4445 + ... + 10001.

It is an arithmetic number, because the mean of its divisors is an integer number (5202288).

Almost surely, 2^40138211 is an apocalyptic number.

40138211 is a deficient number, since it is larger than the sum of its proper divisors (1480093).

40138211 is a wasteful number, since it uses less digits than its factorization.

40138211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 40138211 is about 6335.4724370010. The cubic root of 40138211 is about 342.3886323407.

The spelling of 40138211 in words is "forty million, one hundred thirty-eight thousand, two hundred eleven".