30769945 has 8 divisors (see below), whose sum is σ = 37620936. Its totient is φ = 24151296.

The previous prime is 30769943. The next prime is 30769961. The reversal of 30769945 is 54996703.

It can be written as a sum of positive squares in 4 ways, for example, as 5004169 + 25765776 = 2237^2 + 5076^2 .

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 30769945 - 2¹ = 30769943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30769943) 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, 57792 + ... + 58321.

It is an arithmetic number, because the mean of its divisors is an integer number (4702617).

Almost surely, 2^30769945 is an apocalyptic number.

It is an amenable number.

30769945 is a deficient number, since it is larger than the sum of its proper divisors (6850991).

30769945 is a wasteful number, since it uses less digits than its factorization.

30769945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116171.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 30769945 is about 5547.0663417702. The cubic root of 30769945 is about 313.3590486163.

The spelling of 30769945 in words is "thirty million, seven hundred sixty-nine thousand, nine hundred forty-five".