30508420 has 12 divisors (see below), whose sum is σ = 64067724. Its totient is φ = 12203360.

The previous prime is 30508417. The next prime is 30508441. The reversal of 30508420 is 2480503.

It can be written as a sum of positive squares in 2 ways, for example, as 24127744 + 6380676 = 4912^2 + 2526^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30508391 and 30508400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762691 + ... + 762730.

It is an arithmetic number, because the mean of its divisors is an integer number (5338977).

Almost surely, 2^30508420 is an apocalyptic number.

It is an amenable number.

30508420 is an abundant number, since it is smaller than the sum of its proper divisors (33559304).

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

30508420 is a wasteful number, since it uses less digits than its factorization.

30508420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525430 (or 1525428 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 30508420 is about 5523.4427669706. The cubic root of 30508420 is about 312.4687371392.

Adding to 30508420 its reverse (2480503), we get a palindrome (32988923).

The spelling of 30508420 in words is "thirty million, five hundred eight thousand, four hundred twenty".