30403240 has 64 divisors (see below), whose sum is σ = 81596160. Its totient is φ = 9968640.

The previous prime is 30403237. The next prime is 30403253. The reversal of 30403240 is 4230403.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4080 + ... + 8800.

It is an arithmetic number, because the mean of its divisors is an integer number (1274940).

Almost surely, 2^30403240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30403240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40798080).

30403240 is an abundant number, since it is smaller than the sum of its proper divisors (51192920).

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

30403240 is a wasteful number, since it uses less digits than its factorization.

30403240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4762 (or 4758 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 30403240 is about 5513.9133108891. The cubic root of 30403240 is about 312.1092374451.

Adding to 30403240 its reverse (4230403), we get a palindrome (34633643).

The spelling of 30403240 in words is "thirty million, four hundred three thousand, two hundred forty".