30645745 has 16 divisors (see below), whose sum is σ = 39739392. Its totient is φ = 22553280.

The previous prime is 30645743. The next prime is 30645751. The reversal of 30645745 is 54754603.

It is a happy number.

It is not a de Polignac number, because 30645745 - 2¹ = 30645743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30645745.

It is not an unprimeable number, because it can be changed into a prime (30645743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24280 + ... + 25510.

It is an arithmetic number, because the mean of its divisors is an integer number (2483712).

Almost surely, 2^30645745 is an apocalyptic number.

It is an amenable number.

30645745 is a deficient number, since it is larger than the sum of its proper divisors (9093647).

30645745 is a wasteful number, since it uses less digits than its factorization.

30645745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 30645745 is about 5535.8599151351. The cubic root of 30645745 is about 312.9368652581.

The spelling of 30645745 in words is "thirty million, six hundred forty-five thousand, seven hundred forty-five".