39640893 has 8 divisors (see below), whose sum is σ = 53399808. Its totient is φ = 26154624.

The previous prime is 39640879. The next prime is 39640901. The reversal of 39640893 is 39804693.

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

It is not a de Polignac number, because 39640893 - 2¹³ = 39632701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39640823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67821 + ... + 68402.

It is an arithmetic number, because the mean of its divisors is an integer number (6674976).

Almost surely, 2^39640893 is an apocalyptic number.

It is an amenable number.

39640893 is a deficient number, since it is larger than the sum of its proper divisors (13758915).

39640893 is a wasteful number, since it uses less digits than its factorization.

39640893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136323.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 39640893 is about 6296.1014127792. The cubic root of 39640893 is about 340.9686707084.

The spelling of 39640893 in words is "thirty-nine million, six hundred forty thousand, eight hundred ninety-three".