30655240 has 128 divisors (see below), whose sum is σ = 88646400. Its totient is φ = 9262080.

The previous prime is 30655231. The next prime is 30655241. The reversal of 30655240 is 4255603.

It is not an unprimeable number, because it can be changed into a prime (30655241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113826 + ... + 114094.

It is an arithmetic number, because the mean of its divisors is an integer number (692550).

Almost surely, 2^30655240 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 30655240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44323200).

30655240 is an abundant number, since it is smaller than the sum of its proper divisors (57991160).

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

30655240 is a wasteful number, since it uses less digits than its factorization.

30655240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 30655240 is about 5536.7174390608. The cubic root of 30655240 is about 312.9691810953.

The spelling of 30655240 in words is "thirty million, six hundred fifty-five thousand, two hundred forty".