39640895 has 8 divisors (see below), whose sum is σ = 54364704. Its totient is φ = 27182304.

The previous prime is 39640879. The next prime is 39640901. The reversal of 39640895 is 59804693.

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 39640895 - 2⁴ = 39640879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566264 + ... + 566333.

It is an arithmetic number, because the mean of its divisors is an integer number (6795588).

Almost surely, 2^39640895 is an apocalyptic number.

39640895 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

39640895 is a deficient number, since it is larger than the sum of its proper divisors (14723809).

39640895 is a wasteful number, since it uses less digits than its factorization.

39640895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132609.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 39640895 is about 6296.1015716076. The cubic root of 39640895 is about 340.9686764427.

The spelling of 39640895 in words is "thirty-nine million, six hundred forty thousand, eight hundred ninety-five".