30407220 has 144 divisors (see below), whose sum is σ = 102997440. Its totient is φ = 7216128.

The previous prime is 30407197. The next prime is 30407227. The reversal of 30407220 is 2270403.

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 = 30407193 and 30407202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30407227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57879 + ... + 58401.

It is an arithmetic number, because the mean of its divisors is an integer number (715260).

Almost surely, 2^30407220 is an apocalyptic number.

30407220 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 30407220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51498720).

30407220 is an abundant number, since it is smaller than the sum of its proper divisors (72590220).

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

30407220 is a wasteful number, since it uses less digits than its factorization.

30407220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 569 counting only the distinct ones).

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

The square root of 30407220 is about 5514.2742042811. The cubic root of 30407220 is about 312.1228559560.

Adding to 30407220 its reverse (2270403), we get a palindrome (32677623).

The spelling of 30407220 in words is "thirty million, four hundred seven thousand, two hundred twenty".