30500220 has 48 divisors (see below), whose sum is σ = 85645728. Its totient is φ = 8110080.

The previous prime is 30500219. The next prime is 30500279. The reversal of 30500220 is 2200503.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 30500196 and 30500205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34180 + ... + 35060.

It is an arithmetic number, because the mean of its divisors is an integer number (1784286).

Almost surely, 2^30500220 is an apocalyptic number.

30500220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30500220 is an abundant number, since it is smaller than the sum of its proper divisors (55145508).

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

30500220 is a wasteful number, since it uses less digits than its factorization.

30500220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 30500220 is about 5522.7004264218. The cubic root of 30500220 is about 312.4407396963.

Adding to 30500220 its reverse (2200503), we get a palindrome (32700723).

The spelling of 30500220 in words is "thirty million, five hundred thousand, two hundred twenty".