30085720 has 32 divisors (see below), whose sum is σ = 77364000. Its totient is φ = 10315008.

The previous prime is 30085711. The next prime is 30085723. The reversal of 30085720 is 2758003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30085723) 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 7 ways as a sum of consecutive naturals, for example, 53445 + ... + 54004.

It is an arithmetic number, because the mean of its divisors is an integer number (2417625).

Almost surely, 2^30085720 is an apocalyptic number.

It is an amenable number.

30085720 is an abundant number, since it is smaller than the sum of its proper divisors (47278280).

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

30085720 is a wasteful number, since it uses less digits than its factorization.

30085720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107467 (or 107463 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 30085720 is about 5485.0451228773. The cubic root of 30085720 is about 311.0189158030.

The spelling of 30085720 in words is "thirty million, eighty-five thousand, seven hundred twenty".