30649220 has 24 divisors (see below), whose sum is σ = 73558464. Its totient is φ = 10508256.

The previous prime is 30649207. The next prime is 30649243. The reversal of 30649220 is 2294603.

It is a self number, because there is not a number n which added to its sum of digits gives 30649220.

It is an unprimeable number.

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, 109322 + ... + 109601.

It is an arithmetic number, because the mean of its divisors is an integer number (3064936).

Almost surely, 2^30649220 is an apocalyptic number.

It is an amenable number.

30649220 is an abundant number, since it is smaller than the sum of its proper divisors (42909244).

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

30649220 is a wasteful number, since it uses less digits than its factorization.

30649220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218939 (or 218937 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 30649220 is about 5536.1737689491. The cubic root of 30649220 is about 312.9486930502.

The spelling of 30649220 in words is "thirty million, six hundred forty-nine thousand, two hundred twenty".