30522720 has 48 divisors (see below), whose sum is σ = 96148080. Its totient is φ = 8139264.

The previous prime is 30522707. The next prime is 30522727. The reversal of 30522720 is 2722503.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30522727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31315 + ... + 32274.

It is an arithmetic number, because the mean of its divisors is an integer number (2003085).

Almost surely, 2^30522720 is an apocalyptic number.

30522720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30522720 is an abundant number, since it is smaller than the sum of its proper divisors (65625360).

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

30522720 is a wasteful number, since it uses less digits than its factorization.

30522720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63607 (or 63599 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 30522720 is about 5524.7370978174. The cubic root of 30522720 is about 312.5175499477.

It can be divided in two parts, 30 and 522720, that multiplied together give a square (15681600 = 3960²).

The spelling of 30522720 in words is "thirty million, five hundred twenty-two thousand, seven hundred twenty".