30643420 has 24 divisors (see below), whose sum is σ = 65444400. Its totient is φ = 12049152.

The previous prime is 30643373. The next prime is 30643423. The reversal of 30643420 is 2434603.

It is a junction number, because it is equal to n+sod(n) for n = 30643391 and 30643400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30643423) 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, 11805 + ... + 14164.

It is an arithmetic number, because the mean of its divisors is an integer number (2726850).

Almost surely, 2^30643420 is an apocalyptic number.

It is an amenable number.

30643420 is an abundant number, since it is smaller than the sum of its proper divisors (34800980).

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

30643420 is a wasteful number, since it uses less digits than its factorization.

30643420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26037 (or 26035 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 30643420 is about 5535.6499166765. The cubic root of 30643420 is about 312.9289512000.

The spelling of 30643420 in words is "thirty million, six hundred forty-three thousand, four hundred twenty".