30640505 has 8 divisors (see below), whose sum is σ = 42021312. Its totient is φ = 21010608.

The previous prime is 30640481. The next prime is 30640513. The reversal of 30640505 is 50504603.

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 30640505 - 2⁸ = 30640249 is a prime.

It is a Duffinian 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, 437687 + ... + 437756.

It is an arithmetic number, because the mean of its divisors is an integer number (5252664).

Almost surely, 2^30640505 is an apocalyptic number.

30640505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30640505 is a deficient number, since it is larger than the sum of its proper divisors (11380807).

30640505 is an equidigital number, since it uses as much as digits as its factorization.

30640505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875455.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 30640505 is about 5535.3866170305. The cubic root of 30640505 is about 312.9190282778.

The spelling of 30640505 in words is "thirty million, six hundred forty thousand, five hundred five".