30811424 has 48 divisors (see below), whose sum is σ = 70394688. Its totient is φ = 13001472.

The previous prime is 30811423. The next prime is 30811433. The reversal of 30811424 is 42411803.

It is a self number, because there is not a number n which added to its sum of digits gives 30811424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30811423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13982 + ... + 16034.

It is an arithmetic number, because the mean of its divisors is an integer number (1466556).

Almost surely, 2^30811424 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 30811424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35197344).

30811424 is an abundant number, since it is smaller than the sum of its proper divisors (39583264).

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

30811424 is a wasteful number, since it uses less digits than its factorization.

30811424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137 (or 2129 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 30811424 is about 5550.8039057419. The cubic root of 30811424 is about 313.4997918409.

The spelling of 30811424 in words is "thirty million, eight hundred eleven thousand, four hundred twenty-four".