30005240 has 16 divisors (see below), whose sum is σ = 67511880. Its totient is φ = 12002080.

The previous prime is 30005231. The next prime is 30005243. The reversal of 30005240 is 4250003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30005243) 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, 375026 + ... + 375105.

Almost surely, 2^30005240 is an apocalyptic number.

It is an amenable number.

30005240 is an abundant number, since it is smaller than the sum of its proper divisors (37506640).

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

30005240 is a wasteful number, since it uses less digits than its factorization.

30005240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750142 (or 750138 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 30005240 is about 5477.7038985327. The cubic root of 30005240 is about 310.7413405403.

Adding to 30005240 its reverse (4250003), we get a palindrome (34255243).

The spelling of 30005240 in words is "thirty million, five thousand, two hundred forty".