30040240 has 40 divisors (see below), whose sum is σ = 72102528. Its totient is φ = 11627520.

The previous prime is 30040237. The next prime is 30040253. The reversal of 30040240 is 4204003.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 30040240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3577 + ... + 8536.

Almost surely, 2^30040240 is an apocalyptic number.

It is an amenable number.

30040240 is an abundant number, since it is smaller than the sum of its proper divisors (42062288).

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

30040240 is a wasteful number, since it uses less digits than its factorization.

30040240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12157 (or 12151 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 30040240 is about 5480.8977366851. The cubic root of 30040240 is about 310.8621163433.

Adding to 30040240 its reverse (4204003), we get a palindrome (34244243).

The spelling of 30040240 in words is "thirty million, forty thousand, two hundred forty".