30368520 has 320 divisors, whose sum is σ = 126846720. Its totient is φ = 6345216.

The previous prime is 30368519. The next prime is 30368537. The reversal of 30368520 is 2586303.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 294789 + ... + 294891.

It is an arithmetic number, because the mean of its divisors is an integer number (396396).

Almost surely, 2^30368520 is an apocalyptic number.

30368520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30368520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63423360).

30368520 is an abundant number, since it is smaller than the sum of its proper divisors (96478200).

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

30368520 is a wasteful number, since it uses less digits than its factorization.

30368520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 30368520 is about 5510.7640123671. The cubic root of 30368520 is about 311.9903843190.

The spelling of 30368520 in words is "thirty million, three hundred sixty-eight thousand, five hundred twenty".