40640211 has 10 divisors (see below), whose sum is σ = 60709572. Its totient is φ = 27093420.

The previous prime is 40640177. The next prime is 40640219. The reversal of 40640211 is 11204604.

40640211 is a `hidden beast` number, since 4 + 0 + 640 + 21 + 1 = 666.

It is not a de Polignac number, because 40640211 - 2¹⁴ = 40623827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40640219) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 250785 + ... + 250946.

Almost surely, 2^40640211 is an apocalyptic number.

40640211 is a deficient number, since it is larger than the sum of its proper divisors (20069361).

40640211 is an equidigital number, since it uses as much as digits as its factorization.

40640211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501743 (or 501734 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 40640211 is about 6374.9675293291. The cubic root of 40640211 is about 343.8101163841.

Adding to 40640211 its reverse (11204604), we get a palindrome (51844815).

The spelling of 40640211 in words is "forty million, six hundred forty thousand, two hundred eleven".