30640895 has 8 divisors (see below), whose sum is σ = 36982656. Its totient is φ = 24370336.

The previous prime is 30640891. The next prime is 30640913. The reversal of 30640895 is 59804603.

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 30640895 - 2² = 30640891 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 (30640891) 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, 16847 + ... + 18576.

It is an arithmetic number, because the mean of its divisors is an integer number (4622832).

Almost surely, 2^30640895 is an apocalyptic number.

30640895 is a deficient number, since it is larger than the sum of its proper divisors (6341761).

30640895 is a wasteful number, since it uses less digits than its factorization.

30640895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35601.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 30640895 is about 5535.4218448100. The cubic root of 30640895 is about 312.9203559094.

The spelling of 30640895 in words is "thirty million, six hundred forty thousand, eight hundred ninety-five".