30405252 has 24 divisors (see below), whose sum is σ = 72285696. Its totient is φ = 9943648.

The previous prime is 30405247. The next prime is 30405259. The reversal of 30405252 is 25250403.

It is not an unprimeable number, because it can be changed into a prime (30405259) 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, 23268 + ... + 24539.

It is an arithmetic number, because the mean of its divisors is an integer number (3011904).

Almost surely, 2^30405252 is an apocalyptic number.

It is an amenable number.

30405252 is an abundant number, since it is smaller than the sum of its proper divisors (41880444).

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

30405252 is a wasteful number, since it uses less digits than its factorization.

30405252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47867 (or 47865 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 30405252 is about 5514.0957554254. The cubic root of 30405252 is about 312.1161221273.

Adding to 30405252 its reverse (25250403), we get a palindrome (55655655).

The spelling of 30405252 in words is "thirty million, four hundred five thousand, two hundred fifty-two".