30722290 has 8 divisors (see below), whose sum is σ = 55300140. Its totient is φ = 12288912.

The previous prime is 30722287. The next prime is 30722291. The reversal of 30722290 is 9222703.

It can be written as a sum of positive squares in 2 ways, for example, as 28826161 + 1896129 = 5369^2 + 1377^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30722291) 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 3 ways as a sum of consecutive naturals, for example, 1536105 + ... + 1536124.

Almost surely, 2^30722290 is an apocalyptic number.

30722290 is a deficient number, since it is larger than the sum of its proper divisors (24577850).

30722290 is a wasteful number, since it uses less digits than its factorization.

30722290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072236.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 30722290 is about 5542.7691635138. The cubic root of 30722290 is about 313.1971932589.

Adding to 30722290 its reverse (9222703), we get a palindrome (39944993).

The spelling of 30722290 in words is "thirty million, seven hundred twenty-two thousand, two hundred ninety".