39640213 has 8 divisors (see below), whose sum is σ = 41796000. Its totient is φ = 37491408.

The previous prime is 39640151. The next prime is 39640217. The reversal of 39640213 is 31204693.

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

It is not a de Polignac number, because 39640213 - 2⁹ = 39639701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39640217) 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, 13338 + ... + 16036.

It is an arithmetic number, because the mean of its divisors is an integer number (5224500).

Almost surely, 2^39640213 is an apocalyptic number.

It is an amenable number.

39640213 is a deficient number, since it is larger than the sum of its proper divisors (2155787).

39640213 is a wasteful number, since it uses less digits than its factorization.

39640213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 39640213 is about 6296.0474108761. The cubic root of 39640213 is about 340.9667210380.

The spelling of 39640213 in words is "thirty-nine million, six hundred forty thousand, two hundred thirteen".