30778065 has 12 divisors (see below), whose sum is σ = 53348724. Its totient is φ = 16414944.

The previous prime is 30778051. The next prime is 30778079. The reversal of 30778065 is 56087703.

It is an interprime number because it is at equal distance from previous prime (30778051) and next prime (30778079).

It can be written as a sum of positive squares in 2 ways, for example, as 23357889 + 7420176 = 4833^2 + 2724^2 .

It is not a de Polignac number, because 30778065 - 2⁹ = 30777553 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341934 + ... + 342023.

It is an arithmetic number, because the mean of its divisors is an integer number (4445727).

Almost surely, 2^30778065 is an apocalyptic number.

It is an amenable number.

30778065 is a deficient number, since it is larger than the sum of its proper divisors (22570659).

30778065 is a wasteful number, since it uses less digits than its factorization.

30778065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683968 (or 683965 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 30778065 is about 5547.7982119035. The cubic root of 30778065 is about 313.3866107031.

The spelling of 30778065 in words is "thirty million, seven hundred seventy-eight thousand, sixty-five".