30280240 has 20 divisors (see below), whose sum is σ = 70401744. Its totient is φ = 12112064.

The previous prime is 30280223. The next prime is 30280241. The reversal of 30280240 is 4208203.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (30280241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189172 + ... + 189331.

Almost surely, 2^30280240 is an apocalyptic number.

It is an amenable number.

30280240 is an abundant number, since it is smaller than the sum of its proper divisors (40121504).

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

30280240 is a wasteful number, since it uses less digits than its factorization.

30280240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378516 (or 378510 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 30280240 is about 5502.7484042068. The cubic root of 30280240 is about 311.6877766339.

Adding to 30280240 its reverse (4208203), we get a palindrome (34488443).

The spelling of 30280240 in words is "thirty million, two hundred eighty thousand, two hundred forty".