30470220 has 108 divisors (see below), whose sum is σ = 101665200. Its totient is φ = 7381440.

The previous prime is 30470201. The next prime is 30470227. The reversal of 30470220 is 2207403.

30470220 = T₁₀₂₅ + T₁₀₂₆ + ... + T₁₀₇₉.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 30470193 and 30470202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30470227) 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 35 ways as a sum of consecutive naturals, for example, 21081 + ... + 22479.

Almost surely, 2^30470220 is an apocalyptic number.

30470220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30470220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50832600).

30470220 is an abundant number, since it is smaller than the sum of its proper divisors (71194980).

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

30470220 is a wasteful number, since it uses less digits than its factorization.

30470220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436 (or 1420 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 30470220 is about 5519.9836956281. The cubic root of 30470220 is about 312.3382672438.

Adding to 30470220 its reverse (2207403), we get a palindrome (32677623).

The spelling of 30470220 in words is "thirty million, four hundred seventy thousand, two hundred twenty".