30505560 has 32 divisors (see below), whose sum is σ = 91517040. Its totient is φ = 8134784.

The previous prime is 30505547. The next prime is 30505561. The reversal of 30505560 is 6550503.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 30505560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30505561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126987 + ... + 127226.

Almost surely, 2^30505560 is an apocalyptic number.

30505560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30505560 is an abundant number, since it is smaller than the sum of its proper divisors (61011480).

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

30505560 is a wasteful number, since it uses less digits than its factorization.

30505560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254227 (or 254223 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 30505560 is about 5523.1838644029. The cubic root of 30505560 is about 312.4589727472.

The spelling of 30505560 in words is "thirty million, five hundred five thousand, five hundred sixty".