30722900 has 36 divisors (see below), whose sum is σ = 71800092. Its totient is φ = 11343360.

The previous prime is 30722851. The next prime is 30722903. The reversal of 30722900 is 922703.

It can be written as a sum of positive squares in 6 ways, for example, as 274576 + 30448324 = 524^2 + 5518^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30722903) 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 11 ways as a sum of consecutive naturals, for example, 10517 + ... + 13116.

It is an arithmetic number, because the mean of its divisors is an integer number (1994447).

Almost surely, 2^30722900 is an apocalyptic number.

It is an amenable number.

30722900 is an abundant number, since it is smaller than the sum of its proper divisors (41077192).

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

30722900 is a wasteful number, since it uses less digits than its factorization.

30722900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23660 (or 23653 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 30722900 is about 5542.8241898873. The cubic root of 30722900 is about 313.1992661190.

The spelling of 30722900 in words is "thirty million, seven hundred twenty-two thousand, nine hundred".