30397642 has 16 divisors (see below), whose sum is σ = 50559264. Its totient is φ = 13590000.

The previous prime is 30397637. The next prime is 30397643. The reversal of 30397642 is 24679303.

It is a junction number, because it is equal to n+sod(n) for n = 30397598 and 30397607.

It is not an unprimeable number, because it can be changed into a prime (30397643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9984 + ... + 12667.

It is an arithmetic number, because the mean of its divisors is an integer number (3159954).

Almost surely, 2^30397642 is an apocalyptic number.

30397642 is a deficient number, since it is larger than the sum of its proper divisors (20161622).

30397642 is a wasteful number, since it uses less digits than its factorization.

30397642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22725.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 30397642 is about 5513.4056625647. The cubic root of 30397642 is about 312.0900805531.

The spelling of 30397642 in words is "thirty million, three hundred ninety-seven thousand, six hundred forty-two".