30220308 has 18 divisors (see below), whose sum is σ = 76390314. Its totient is φ = 10073424.

The previous prime is 30220277. The next prime is 30220327. The reversal of 30220308 is 80302203.

It can be written as a sum of positive squares in only one way, i.e., 23155344 + 7064964 = 4812^2 + 2658^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×30220308² = 1826534031229728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 419691 + ... + 419762.

Almost surely, 2^30220308 is an apocalyptic number.

It is an amenable number.

30220308 is an abundant number, since it is smaller than the sum of its proper divisors (46170006).

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

30220308 is a wasteful number, since it uses less digits than its factorization.

30220308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839463 (or 839458 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 30220308 is about 5497.3000645772. The cubic root of 30220308 is about 311.4820053725.

The spelling of 30220308 in words is "thirty million, two hundred twenty thousand, three hundred eight".