30897285 has 8 divisors (see below), whose sum is σ = 49435680. Its totient is φ = 16478544.

The previous prime is 30897277. The next prime is 30897289. The reversal of 30897285 is 58279803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30897285 - 2³ = 30897277 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30897289) 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, 1029895 + ... + 1029924.

It is an arithmetic number, because the mean of its divisors is an integer number (6179460).

Almost surely, 2^30897285 is an apocalyptic number.

It is an amenable number.

30897285 is a deficient number, since it is larger than the sum of its proper divisors (18538395).

30897285 is a wasteful number, since it uses less digits than its factorization.

30897285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059827.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 30897285 is about 5558.5326301102. The cubic root of 30897285 is about 313.7907276643.

The spelling of 30897285 in words is "thirty million, eight hundred ninety-seven thousand, two hundred eighty-five".