30390705 has 24 divisors (see below), whose sum is σ = 54969408. Its totient is φ = 15503136.

The previous prime is 30390691. The next prime is 30390707. The reversal of 30390705 is 50709303.

It is not a de Polignac number, because 30390705 - 2⁶ = 30390641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30390707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13647 + ... + 15716.

It is an arithmetic number, because the mean of its divisors is an integer number (2290392).

Almost surely, 2^30390705 is an apocalyptic number.

It is an amenable number.

30390705 is a deficient number, since it is larger than the sum of its proper divisors (24578703).

30390705 is a wasteful number, since it uses less digits than its factorization.

30390705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29397 (or 29394 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 27.

The square root of 30390705 is about 5512.7765236766. The cubic root of 30390705 is about 312.0663382116.

The spelling of 30390705 in words is "thirty million, three hundred ninety thousand, seven hundred five".