30920706 has 12 divisors (see below), whose sum is σ = 66994902. Its totient is φ = 10306896.

The previous prime is 30920693. The next prime is 30920707. The reversal of 30920706 is 60702903.

It can be written as a sum of positive squares in only one way, i.e., 30902481 + 18225 = 5559^2 + 135^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30920706.

It is not an unprimeable number, because it can be changed into a prime (30920707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 858891 + ... + 858926.

Almost surely, 2^30920706 is an apocalyptic number.

30920706 is an abundant number, since it is smaller than the sum of its proper divisors (36074196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30920706 is a wasteful number, since it uses less digits than its factorization.

30920706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717825 (or 1717822 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 30920706 is about 5560.6389920584. The cubic root of 30920706 is about 313.8699950004.

It can be divided in two parts, 30920 and 706, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 30920706 in words is "thirty million, nine hundred twenty thousand, seven hundred six".