30807220 has 24 divisors (see below), whose sum is σ = 64802304. Its totient is φ = 12302496.

The previous prime is 30807209. The next prime is 30807223. The reversal of 30807220 is 2270803.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30807191 and 30807200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30807223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18877 + ... + 20443.

It is an arithmetic number, because the mean of its divisors is an integer number (2700096).

Almost surely, 2^30807220 is an apocalyptic number.

It is an amenable number.

30807220 is an abundant number, since it is smaller than the sum of its proper divisors (33995084).

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

30807220 is a wasteful number, since it uses less digits than its factorization.

30807220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559 (or 2557 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 30807220 is about 5550.4252089367. The cubic root of 30807220 is about 313.4855329189.

The spelling of 30807220 in words is "thirty million, eight hundred seven thousand, two hundred twenty".