30643432 has 8 divisors (see below), whose sum is σ = 57456450. Its totient is φ = 15321712.

The previous prime is 30643423. The next prime is 30643433. The reversal of 30643432 is 23434603.

It can be written as a sum of positive squares in only one way, i.e., 21846276 + 8797156 = 4674^2 + 2966^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 30643397 and 30643406.

It is not an unprimeable number, because it can be changed into a prime (30643433) 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 as a sum of consecutive naturals, namely, 1915207 + ... + 1915222.

Almost surely, 2^30643432 is an apocalyptic number.

It is an amenable number.

30643432 is a deficient number, since it is larger than the sum of its proper divisors (26813018).

30643432 is a wasteful number, since it uses less digits than its factorization.

30643432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830435 (or 3830431 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 30643432 is about 5535.6510005599. The cubic root of 30643432 is about 312.9289920478.

The spelling of 30643432 in words is "thirty million, six hundred forty-three thousand, four hundred thirty-two".