30722689 has 8 divisors (see below), whose sum is σ = 32638248. Its totient is φ = 28819200.

The previous prime is 30722663. The next prime is 30722701. The reversal of 30722689 is 98622703.

It can be written as a sum of positive squares in 4 ways, for example, as 6051600 + 24671089 = 2460^2 + 4967^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30722689 - 2²¹ = 28625537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30722609) 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, 2539 + ... + 8239.

It is an arithmetic number, because the mean of its divisors is an integer number (4079781).

Almost surely, 2^30722689 is an apocalyptic number.

It is an amenable number.

30722689 is a deficient number, since it is larger than the sum of its proper divisors (1915559).

30722689 is a wasteful number, since it uses less digits than its factorization.

30722689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 30722689 is about 5542.8051562363. The cubic root of 30722689 is about 313.1985491164.

The spelling of 30722689 in words is "thirty million, seven hundred twenty-two thousand, six hundred eighty-nine".