30816965 has 8 divisors (see below), whose sum is σ = 37092120. Its totient is φ = 24579072.

The previous prime is 30816959. The next prime is 30816977. The reversal of 30816965 is 56961803.

It can be written as a sum of positive squares in 4 ways, for example, as 8025889 + 22791076 = 2833^2 + 4774^2 .

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 30816965 - 2⁶ = 30816901 is a prime.

It is a super-2 number, since 2×30816965² = 1899370663622450, which contains 22 as substring.

It is a congruent 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, 7460 + ... + 10829.

It is an arithmetic number, because the mean of its divisors is an integer number (4636515).

Almost surely, 2^30816965 is an apocalyptic number.

It is an amenable number.

30816965 is a deficient number, since it is larger than the sum of its proper divisors (6275155).

30816965 is a wasteful number, since it uses less digits than its factorization.

30816965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18631.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 30816965 is about 5551.3030001973. The cubic root of 30816965 is about 313.5185835530.

The spelling of 30816965 in words is "thirty million, eight hundred sixteen thousand, nine hundred sixty-five".