30897966 has 16 divisors (see below), whose sum is σ = 67413888. Its totient is φ = 9363000.

The previous prime is 30897953. The next prime is 30897983. The reversal of 30897966 is 66979803.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 234010 + ... + 234141.

It is an arithmetic number, because the mean of its divisors is an integer number (4213368).

Almost surely, 2^30897966 is an apocalyptic number.

30897966 is an abundant number, since it is smaller than the sum of its proper divisors (36515922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30897966 is a wasteful number, since it uses less digits than its factorization.

30897966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468167.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 30897966 is about 5558.5938869466. The cubic root of 30897966 is about 313.7930330439.

The spelling of 30897966 in words is "thirty million, eight hundred ninety-seven thousand, nine hundred sixty-six".