30340856 has 64 divisors (see below), whose sum is σ = 71124480. Its totient is φ = 11813760.

The previous prime is 30340831. The next prime is 30340867. The reversal of 30340856 is 65804303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51395 + ... + 51981.

It is an arithmetic number, because the mean of its divisors is an integer number (1111320).

Almost surely, 2^30340856 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 30340856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35562240).

30340856 is an abundant number, since it is smaller than the sum of its proper divisors (40783624).

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

30340856 is a wasteful number, since it uses less digits than its factorization.

30340856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 30340856 is about 5508.2534436970. The cubic root of 30340856 is about 311.8956203543.

The spelling of 30340856 in words is "thirty million, three hundred forty thousand, eight hundred fifty-six".