30730645 has 32 divisors (see below), whose sum is σ = 44478720. Its totient is φ = 20106240.

The previous prime is 30730643. The next prime is 30730663. The reversal of 30730645 is 54603703.

It is not a de Polignac number, because 30730645 - 2¹ = 30730643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30730643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20791 + ... + 22219.

It is an arithmetic number, because the mean of its divisors is an integer number (1389960).

Almost surely, 2^30730645 is an apocalyptic number.

It is an amenable number.

30730645 is a deficient number, since it is larger than the sum of its proper divisors (13748075).

30730645 is a wasteful number, since it uses less digits than its factorization.

30730645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 30730645 is about 5543.5227969225. The cubic root of 30730645 is about 313.2255822600.

It can be divided in two parts, 30730 and 645, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 30730645 in words is "thirty million, seven hundred thirty thousand, six hundred forty-five".